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A873
Book contribution:
Geikie, A. 1888. The life and letters of Charles Darwin. Littell's Living Age 176, 2271 (7 January): 3-10.
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judgment, he was prevailed upon to undertake the duties of honorary secretary of the Geological Society, an office which he continued to hold for three years. And at each period of enforced holiday, for his health had already begun to give way, he occupied himself with geological work in the field. In the midlands he watched the operations of earth-worms, and be^an those inquiries which formed the subject of his last research, and of the volume on Vegetable Mould which he published [page]
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F1528.3
Book:
Darwin, F. ed. 1889. Charles Darwins liv og breve med et kapitel selvbiografi. Translated by Martin Simon Søraas. Fagerstrand pr. Høvig: Bibliothek for de Tusen Hjem. Volume 3.
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Mould, through the Action of Worms, with Observations on their Habits. 8vo. London, 1881. II. Fortegnelse over b ger med bidrag af Charles Darwin. A manuel of scientific enquiry; prepared for the use of Her Majesty's Navy: and adapted for travellers in general. Ed. by Sir John F. W. Herschel, Bart. 8vo. London, 1849. '(6te afsnit: geologi, af Charles Darwin.) Memoir ol the Rev. John Stevens Henslow. By the Rev. Leonard Jenyns. 8vo. London, 1862. (I 3die kapitel: Erindringer, af Charles Darwin
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F1528.3
Book:
Darwin, F. ed. 1889. Charles Darwins liv og breve med et kapitel selvbiografi. Translated by Martin Simon Søraas. Fagerstrand pr. Høvig: Bibliothek for de Tusen Hjem. Volume 3.
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BLANDINGER (FORTSAT). [1881] n sten er f rdig med halvparten af. Titlen blir' (ialfald forel big bestemt) „The Formation of Vege-table Mould through the Action of Worms (i den virkelige titel er tilf iet: „with Observations on Their Habits ). Saavidt jeg skj nner, blir det en snurrig liden bog' Manuskriptet sendtes i trykken i april 1881, og da korrektur-arkene begyndte at indl be, skrev han til professor Carus: „Emnet har v ret mkt kjephest, og jeg har kanske behandlet det rent for meget i
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A1015
Book:
Wallace, A. R. 1889. Darwinism: an exposition of the theory of natural selection with some of its applications. London & New York: Macmillan & Co.
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all slightly divergent forms of one type, with modifications in the shape of the wing, feet, and bill adapting them to slightly different modes of life. The whin-chat is the smallest, and frequents furzy commons, fields, and lowlands, feeding on worms, insects, small molluscs, and berries; the stone-chat is next in size, and is especially active and lively, frequenting heaths and uplands, and is a permanent resident with us, the two other species being migrants; while the larger and more
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A1015
Book:
Wallace, A. R. 1889. Darwinism: an exposition of the theory of natural selection with some of its applications. London & New York: Macmillan & Co.
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in the northern hemisphere, and obtain their food entirely in the water, consisting, as it does, of water-beetles, caddis-worms and other insect-larv , as well as numerous small fresh-water shells. These birds, although not far removed in structure from thrushes and wrens, have the extraordinary power of flying under water; for such, according to the best observers, is their process of diving in search of their prey, their dense and somewhat fibrous plumage retaining so much air that the water is
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A1015
Book:
Wallace, A. R. 1889. Darwinism: an exposition of the theory of natural selection with some of its applications. London & New York: Macmillan & Co.
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black Telephorid , commonly called soldiers and sailors, were found, by Mr. Jenner Weir, to be refused by small birds. These and the allied Lampyrid (the fire-flies and glow-worms) in Nicaragua, were rejected by Mr. Belt's tame monkey and by his fowls, though most other insects were greedily eaten by them. The Coccinellid or lady-birds are another uneatable group, and their conspicuous and singularly spotted bodies serve to distinguish them at a glance from all other beetles. These uneatable
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A1015
Book:
Wallace, A. R. 1889. Darwinism: an exposition of the theory of natural selection with some of its applications. London & New York: Macmillan & Co.
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protection or recognition. There remains, however, another set of colours, chiefly among the higher animals, which, being connected with some of the most interesting and most disputed questions in natural history, must be discussed in a separate chapter. 1 Mr. Belt first suggested this use of the light of the Lampyrid (fireflies and glow-worms) Naturalist in Nicaragua, p. 320. Mr. Verrill and Professor Meldola made the same suggestion in the case of medus and other phosphorescent marine organisms
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A1015
Book:
Wallace, A. R. 1889. Darwinism: an exposition of the theory of natural selection with some of its applications. London & New York: Macmillan & Co.
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. F. E., variations of earth-worms, 67 on plumes of bird of paradise, 292 Beech trees, aggressive in Denmark, 21 Beetle and wasp (figs.), 259 Beetle, fossil in coal measures of Silesia, 404 Beginnings of important organs, 128 Belt, Mr., on leaf-like locust, 203 on birds avoiding Heliconid , 234 Belt's frog, 266 Birds, rate of increase of, 25 how destroyed, 26 variation among, 49 variation of markings of, 52 variation of wings and tails of, 53 diagram showing variation of tarsus and toes, 60 use of
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F1528.3
Book:
Darwin, F. ed. 1889. Charles Darwins liv og breve med et kapitel selvbiografi. Translated by Martin Simon Søraas. Fagerstrand pr. Høvig: Bibliothek for de Tusen Hjem. Volume 3.
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. Fordyee, J., uddrag af brev til, I 344. Ford ielse hos Drosera, III 361, 363, 365. Ford ielsesproeessen hos Pinguieula, III 364. Forel, Auguste, brev til, om myrer, III 216. Forel sning, Huxleys, i Royal Institution, II 277. Forenede Stater, angiosperme planter i cretaciske lag i, III 280. — nordlige, floraen i, II 104. Forfedres karakterm rker, gjenoptr den af, III 277. «Formation of Vegetable Mould through the Action of Worms«, udgivelse af, I 117; III 246; uventet lykke, III 246, 247. [page
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F277
Book:
Darwin, C. R. 1889. The structure and distribution of coral reefs. 3d ed. With a preface to the third edition by Francis Darwin and an appendix by T. G. Bonney. London: Smith Elder and Co.
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. Woodcuts. 6s. THE EFFECTS OF CROSS AND SELF-FERTILIZATION IN THE VEGETABLE KINGDOM. Illustrations. 9s. THE DIFFERENT FORMS OF FLOWERS ON PLANTS OF THE SAME SPECIES. Illustrations. 7s. 6d. THE POWER OF MOVEMENT IN PLANTS. Woodcuts. THE FORMATIONS OF VEGETABLE MOULD THROUGH THE ACTION OF WORMS. Woodcuts. Crown 8vo. 6s. LIFE OF ERASMUS DARWIN. With a Study of his Scientific Works. Portrait. 7s. 6d. THE STRUCTURE AND DISTRIBUTION OF CORAL REEFS Third Edition. With Introduction by Professor T. G. BONNEY
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F59
Book:
Darwin, C. R. 1890. Journal of researches into the natural history and geology of the various countries visited by H.M.S. Beagle etc. London: John Murray. (First Murray illustrated edition.)
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appeared of a reddish colour, and this perhaps was owing to some infusorial animalcula. The mud in many places was thrown up by numbers of some kind of worm, or annelidous animal. How surprising it is that any creatures should be able to exist in brine, and that they should be crawling among crystals of sulphate of soda and lime! And what becomes of these worms when, during the long summer, the surface is hardened into a solid layer of salt? Flamingoes in considerable numbers inhabit this lake
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F1146
Book:
Darwin, C. R. 1890. The expression of the emotions in man and animals. 2d ed. Edited by Francis Darwin. London: John Murray.
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Thousand. Illustrations. 9s. MURRAY. THE MOVEMENTS AND HABITS OF CLIMBING PLANTS. Third Thousand. Woodcuts. 6s. MURRAY. THE EFFECTS OF CROSS AND SELF-FERTILIZATION IN THE VEGETABLE KINGDOM. Third Thousand. Illustrations. 9s. MURRAY. THE DIFFERENT FORMS OF FLOWERS ON PLANTS OF THE SAME SPECIES. Third Thousand. Illustrations. 7s. 6d. MURRAY. THE POWER OF MOVEMENT IN PLANTS. Third Thousand. Woodcuts. MURRAY. THE FORMATION OF VEGETABLE MOULD THROUGH THE ACTION OF WORMS. Twelfth Thousand. Woodcuts. Crown
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F59
Book:
Darwin, C. R. 1890. Journal of researches into the natural history and geology of the various countries visited by H.M.S. Beagle etc. London: John Murray. (First Murray illustrated edition.)
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land, interested me much. These animals are of so simple a structure, that Cuvier has arranged them with the intestinal worms, though never found within the bodies of other animals. Numerous species inhabit both salt and fresh water; but those to which I allude were found, even in the drier parts of the forest, beneath logs of rotten wood, on which I believe they feed. In general form they resemble little slugs, but are very much narrower in proportion, and several of the species are
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F59
Book:
Darwin, C. R. 1890. Journal of researches into the natural history and geology of the various countries visited by H.M.S. Beagle etc. London: John Murray. (First Murray illustrated edition.)
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Spanish guttural g, followed by a rough double r r; when uttering this cry it elevates its head higher and higher, till at last, with its beak wide open, the crown almost touches the lower part of the back. This fact, which has been doubted, is quite true; I have seen them several times with their heads backwards in a completely inverted position. To these observations I may add, on the high authority of Azara, that the Carrancha feeds on worms, shells, slugs, grasshoppers, and frogs ; that it
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F59
Book:
Darwin, C. R. 1890. Journal of researches into the natural history and geology of the various countries visited by H.M.S. Beagle etc. London: John Murray. (First Murray illustrated edition.)
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shoals grazing with their strong bony jaws on the tops of the coral branches; I opened the intestines of several and found them distended with yellowish calcareous sandy mud. The slimy disgusting Holothuri (allied to our star-fish), which the Chinese gourmands are so fond of, also feed largely, as I am informed by Dr. Allan, on corals; and the bony apparatus within their bodies seems well adapted for this end. These holothuri , the fish, the numerous burrowing shells, and nereidous worms, which
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F59
Book:
Darwin, C. R. 1890. Journal of researches into the natural history and geology of the various countries visited by H.M.S. Beagle etc. London: John Murray. (First Murray illustrated edition.)
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. 46 40', 260, in Cordillera, 346 Glow-worms, 31 Goats destructive to vegetation at St. Helena, 520 bones of, 177 Goeree Roads, 230 Go tre, 336 [page] 544 INDE
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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[page] Crabs, Worms, and Fishes. 17
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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thus gave my father the opportunity of seeing for himself the effects produced by earthworms on the old concrete floors, walls, c. On his return he wrote to Sir Thomas Farrer: I cannot remember a more delightful week than the last. I know very well that E. will not believe me, but the worms were by no means the sole charm. In the autumn of 1880, when the Power of Movement in Plants was nearly finished, he began once more on the subject. He wrote to Professor Carus (September 21): In the
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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noting the strange effects occasioned in the mimosæ, as they drooped their sensitive petioles when disturbed. From the forest he returned to the shores of Botofogo Bay, where he devoted himself to a study of the invertebrate animals which abounded there. The Planarian worms were a constant source of interest, specimens found near here possessing a singular tenacity to life even when the body appeared dead or lifeless, the mouth parts protruding as he touched them with his forceps, showing a
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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and could only be detected by the most careful observation. The worms were of deep tints of olive and yellow, and so on all through this floating city; the same brush, the same colours, the same artist had been employed, each and every living creature being in colour a mimic of the vast weed bed that constituted their floating home. The fact that I could not find the crabs and other forms without difficulty, though they were floating upon the surface, often in full view, suggested at once that
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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Wedgwood, who suggested that worms, by bringing earth to the surface in their castings, must undermine any objects lying on the surface and cause an apparent sinking. In the book of 1881 he extended his observations on this burying action, and devised a number of different ways of checking his estimates as to the amount of work done. He also added a mass of observations on the natural history and intelligence of worms, a part of the work which added greatly to its popularity. In 1877 Sir Thomas
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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the societies, read a paper before the Geological Society on the Erratic Boulders of South America, another on Earthquakes, and still another on the Formation by the Agency of Earth-Worms of Mould. The zoölogy of the Beagle was in progress now, and received a portion of his time as well. Ill-health continued to follow him, and he tells us that scarcely twenty-four hours went over his head without some suffering. Yet this did not deter him from work; on the contrary, it seemed to spur him on to
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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some seedlings The little beggars are doing just what I don't want them to. He would speak in a half-provoked, half-admiring way of the ingenuity of the leaf of a Sensitive Plant in screwing itself out of a basin of water in which he had tried to fix it. One might see the same spirit in his way of speaking of Sundew, earthworms, c.* * Cf. Leslie Stephen's Swift, 1882, p. 200, where Swift's inspection of the manners and customs of servants are compared to my father's observations on worms, The
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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isolation, 278. Wallace, A. R., first essay on variability of species, 41, 188; article in the 'Quarterly Review,' April, 1869.. 260; opinion of Pangenesis, 266; review of the 'Expression of the Emotions,' 279 , letters to: on a paper by Wallace, 182; on the 'Origin of Species,' 195, 209; on 'Warrington's paper at the Victoria Institute,' 264, note; on man, 268; on sexual selection, 269, 270; on WORMS. Mr. Wright's pamphlet in answer to Mivart, 275; on Mivart's remarks and an article in the
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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collecting eggs think of the rights of the birds? Yet our young naturalist, while an indefatigable collector of birds' eggs and nests, was invariably careful to take but one egg from each nest,—recognising in this the rights of the lower animals. His humanitarian ideas were carried to what some would consider extremes; thus, hearing at his uncle Josiah Wedgwood's, that it was cruel to spit living worms, he killed them first by a bath of salt and water. As a boy he was fond of solitary walks
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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for this purpose. Darwin saw in these coral-eating fish, the holothurians that ate mud and ground it up, the worms and shells, the agents which were at work here in lagoon-making, the white deposit of mud being mainly due to them—a suggestion that has been shown to contain much truth. The dredging about Keeling Island was suggestive to Darwin of interesting theories regarding the structure of reefs. Thus he found that at a distance of twenty-two hundred yards from the shore the water suddenly
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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gave to it. While on a visit to his uncle the latter suggested that the supposed sinking of stones on the surface was really due to the castings of earth-worms. The idea made so strong an impression upon the mind of the naturalist, that he read the paper previously referred to on the subject before the Geological Society. When the farm at Down was secured, in 1842, he set apart some of the ground for his experiment, which was to cover a part of the field with broken chalk, and note, among other
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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the German of Krause, in 1879, The Power of Movement in Plants, and finally, in 1881, he published the work previously referred to, The Formation of Vegetable Mould through the Action of Worms, that was the outcome of the paper read forty years previous before the Linnæan Society, comprising, as we have seen, experiments which entailed a wait of twenty years before the exact result desired could be deter-mined. This was the last great work of the naturalist. In Darwin's works there is rarely
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A268
Book:
Holder, Charles Frederick. 1892. Charles Darwin: his life and work. New York: G. P. Putnam's sons.
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Kingdom. 2d edition. 8vo. London, 1878. The Different Forms of Flowers on Plants of the Same Species. 8vo. London, 1877. The Different Forms of Flowers on Plants of the Same Species. 2d edition. 8vo. London, 1880. The Power of Movement in Plants. By Charles Darwin, assisted by Francis Darwin. 8vo. London, 1880. The Formation of Vegetable Mould, through the Action of Worms, with Observations on their Habits. 8vo. London, 1881. [page] 266 Charles Darwin
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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reflect much on the effects of subsidence, and it was easy to replace in imagination the continued deposition of sediment by the upward growth of corals. To do this was to form my theory of the formation of barrier-reefs and atolls. Besides my work on coral-reefs, during my residence in London, I read before the Geological Society papers on the Erratic Boulders of South America,* on Earthquakes, and on the Formation by the Agency of Earth-worms of Mould. I also continued to superintend the
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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Pasteur's results in modifying the germs of the most malignant diseases, from which, as it happens, animals will in the first place receive more relief than man. Let it be remembered how many lives and what a fearful amount of suffering have been saved by the knowledge gained of parasitic worms through the experiments of Virchow and others on living animals. In the future every one will be astonished at the ingratitude shown, at least in England, to these benefactors of mankind. As for myself
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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, but from a sort of bravado. I had a strong taste for angling, and would sit for any number of hours on the bank of a river or pond watching the float; when at Maer* I was told that I could kill the worms with salt and water, and from that day I never spitted a living worm, though at the expense probably of some loss of success. Once as a very little boy whilst at the day school, or before that time, I acted cruelly, for I beat a puppy, I believe, simply from enjoying the sense of power; but the
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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, the attraction of gravity, c., are all modified forms of the fundamental movement of circumnutation. It has always pleased me to exalt plants in the scale of organised beings; and I therefore felt an especial pleasure in showing how many and what admirably well adapted movements the tip of a root possesses. I have now (May 1, 1881) sent to the printers the MS. of a little book on The Formation of Vegetable Mould through the Action of Worms. This is a subject of but small importance; and I know
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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FORMATION 'Formation of Vegetable Mould, through the action of Worms,' publication of the, 49, 285; unexpected success of the, 285. Fossil bones, given to the College of Surgeons, 142. Fox, Rev. William Darwin, 21; letters to, 110-113, 114, 181; from Botofogo Bay, 132; in 1836-1842: 143, 148, 149; on the house at Down, 150; on their respective families, 160; on family matters, 194; on the progress of the work, 181, 183, 196; on the award of the Copley Medal, 259. France and Germany, contrast
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F1461
Book:
Darwin, Francis ed. 1892. Charles Darwin: his life told in an autobiographical chapter, and in a selected series of his published letters [abridged edition]. London: John Murray.
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roads of Glen Roy, paper on the, 145. Parasitic worms, experiments on, 290. Parslow, Joseph, 150, note. 'Parthenon,' review of the 'Fertilisation of Orchids,' in the, 308. Pasteur's results upon the germs of diseases, 290. Patagonia, 29. Peacock, Rev. George, letter from, to Professor Henslow, 115. Philosophical Club, 178. Magazine, 25. Photograph-albums received from Germany and Holland, 293. Pictet, Professor F. J., review of the 'Origin' in the 'Biblioth que Universelle,' 231. Pictures, taste
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A617
Book contribution:
Grant Duff, Mountstuart E. 1898. [Recollections of Darwin]. Notes from a diary, 1873-1881. London: John Murray, vol. 2, pp. 283; 300.
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16. [January 1881] In the afternoon we walked up [from John Lubbock's] to see Darwin. He has of late been studying earthworms, and said to Lubbock, You antiquarians ought to have great respect for them; they have done more to preserve tesselated apavements than any other agency. I have ascertained, by careful examination, that the worms on a single acre of land bring up ten tons of dry earth to the surface in a year
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A350
Book contribution:
Martin, A. Patchett. 1893. Life and letters of the Right Honourable Robert Lowe, Viscount Sherbrooke, G.C.B., D.C.L., etc., with a memoir of Sir John Coape Sherbrooke, G.C.B. sometimes Governor-General of Canada. London: Longmans, Green and Co. 2 vols. [Darwin recollections only, vol. 1, pp. 19-20; vol. 2, pp. 198-207.]
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causes. Whatever value the book has is confined to the light which it sheds upon the causes which limit animal population. But this light is shed incidentally, for the author impairs the value of his own remarks by confounding the causes which kill individuals with those which exterminate an entire species. A species may be kept constantly within the limits indicated by its potential capacity of multiplication, without being in danger of extinction :—Because birds eat worms, it does not follow
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A1107
Periodical contribution:
[Newman, George.] 1893. Darwin's house at Down. Maidstone Journal and Kentish Advertiser (22 June): 5.
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Darwin did most of his writing, surrounded by his books. The chair stood near the fireplace, and in the wall by its side was a number of brass-beaded nails which the great man had placed there himself, for convenience of suspending specimens, papers, c. There are extensive shrubbery walks in the grounds, which he used for exercise and mediation. Just over the fence which divides the paddock from the lawn, we were shewn the contrivance for observing the habits of earth worms —a subject on which
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A483
Periodical contribution:
Vignoles, O. J. 1893. The home of a naturalist. Good Words 34: 95-101.
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counted each individual stem as it grew, in order to observe or discover the traces of cross-fertilisation, or the tendency of any species to variation. And it was in the neighbouring meadow that he laid down the chalk, the gradual subsidence of which was to mark the rate of deposition of the mould above it by the operation of earth worms. At the eastern extremity of the outbuildings were the dove-cots, the home of birds now immortalised in the prosaic records of science, in which were reared
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A986
Periodical contribution:
Vaughan, John. 1893. Boyhood of Charles Darwin. Boys Own Paper, 8 April: 445-446.
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collections of various objects. His love for dogs amounted to a passion: and once he tells us when he had beaten a puppy. The deed haunted him for days. His humanity was always remarkable. He would never take more than a single egg out of a bird's nest; and would first kill with salt and water the worms he was about to use in fishing. His skill at throwing was great, and once he killed a hare with a marble; years afterwards, he threw stone at a crossbeak, and to his deep sorrow, killed it. He
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A1853
Review:
Lyndon, Louise. 1894. [Review of Earthworms]. Darwin's earthworms: A great man's interesting and instructive experiments. Inter-Ocean (4 November): 5-6.
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see Darwin at home with the flowerpot, containing the worms, at his elbow for daily consideration, month after month, but one becomes personally interested in the earthworms as a colony. It is possible to feel sorry when one of them dies. Fat, squirming earthworms brought to the surface by a chance spadeful of soil in the garden seem to be there by chance, mere in-earth dweller. But Darwin began his work among them by regarding each as an individual of well-developed intelligence and inhabiting a
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A238
Book:
Wallace, A. R. 1895. Natural selection and tropical nature: Essays on descriptive and theoretical biology. London: Macmillan.
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Climbing Plants appeared in 1875; a thick volume on Insectivorous Plants in the same year; Cross and Self-Fertilisation in 1876; the Forms of Flowers in 1877; the Movements of Plants, embodying much original research, in 1880; and his remarkable little book on Earthworms in 1881. This last work is highly characteristic of the author. In 1837 he had contributed to the Geological Society a short paper on the formation of vegetable mould by the agency of worms. For more than forty years this subject
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A334
Book:
Poulton, Edward Bagnall. 1896. Charles Darwin and the theory of natural selection. London: Cassell & Co.
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of earth thus swallowed by a single worm is not large, worms are so numerous that the whole of the superficial mould . . . . has passed, and will again pass, every few years through the bodies of worms. The result of this unceasing transport of the deeper mould to the surface is shown to be the burial of stones, either singly or in layers (as in paths), the covering and consequent protection of ancient buildings, and the preparation of soil for plants. In addition to this, the geological
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A334
Book:
Poulton, Edward Bagnall. 1896. Charles Darwin and the theory of natural selection. London: Cassell & Co.
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UNDERSTOOD (continued) VIEWS ON SPONTANEOUS GENERATION 153 XXI. VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION: PANGENESIS (1868) 161 XXII. PANGENESIS AND CONTINUITY OF THE GERM-PLASM: DARWIN'S CONFIDENCE IN PANGENESIS 178 XXIII. DESCENT OF MAN EXPRESSION OF EMOTIONS EARTH-WORMS (1871 81) 186 XXIV. BOTANICAL WORKS (1862 86) 193 XXV. LETTERS FROM DARWIN TO PROFESSOR MELDOLA (1871 82) 199 XXVI. HIS LAST ILLNESS (1882) 219 INDEX 221 [page 9
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A334
Book:
Poulton, Edward Bagnall. 1896. Charles Darwin and the theory of natural selection. London: Cassell & Co.
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through the Action of Worms, 191; his Life of Erasmus Darwin, 192; Fertilisation of Orchids, 193; Cross- and Self-Fertilisation in the Vegetable Kingdom, 194; Different Forms of Flowers on Plants of Same Species, 194; Climbing Plants, 196; Power of Movement in Plants, 197; Insectivorous Plants, 198; Letters to Prof. Meldola, 199, et seq.; his Last Illness, 219; and Death, 220 Darwin, Erasmus, Brother of Charles, 11 Darwin, Erasmus, Grandfather of Charles, 10, 192 Darwin, Prof. George, Brother of
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A334
Book:
Poulton, Edward Bagnall. 1896. Charles Darwin and the theory of natural selection. London: Cassell & Co.
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1843. He also read several papers before the Geological Society, including two (1838 and 1840) on the Formation of Mould by the Action of Earth-Worms a subject to which he returned, and upon which his last volume (published in 1881) was written. He also read a paper on the Parallel Roads of Glen Roy before the Royal Society (published in the Phil. Trans., 1839). These wonderful parallel terraces are now admitted to be due to the changes of level in a lake following those of an ice-barrier at
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A334
Book:
Poulton, Edward Bagnall. 1896. Charles Darwin and the theory of natural selection. London: Cassell & Co.
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; Voyage of the Beagle, 21, et seq.; Preparation for and Effects of the Voyage, 22; the Most Important Discoveries during, 23; Places Visited, 23, 24; Re-visits Cambridge, 25; Work upon the Collections, and the Naturalist's Voyage, 25; at London, 25; Origin of Species, 25 29; Geological Work, 29, 33; Completion of A Naturalist's Voyage, 30; Zoology of the Voyage of the Beagle, 31; Papers on Earth-Worms, 31; Marriage, 32; Book on the Coral Reefs, 32; Ill-health, 32; at Down, 35; his Career as a
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F1548.2
Book:
Darwin, Francis & Seward, A. C. eds. 1903. More letters of Charles Darwin. A record of his work in a series of hitherto unpublished letters. London: John Murray. Volume 2
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somewhat rolled about. But not a few of the particles may have passed through the bodies of worms during the years since the road was laid down. I still think that the fragments are ground in the gizzards of worms, which always contain bits of stone; but I must try and get more evidence. I have to-day started a pot with worms in very fine soil, with sharp fragments of hard tiles laid on the surface, and hope to see in the course of time whether any of those become rounded. I do not think that more
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F1548.2
Book:
Darwin, Francis & Seward, A. C. eds. 1903. More letters of Charles Darwin. A record of his work in a series of hitherto unpublished letters. London: John Murray. Volume 2
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sickly (probably with parasites) worms is thus hastened. I will add a few words to what I have said about these tracks. Occasionally worms suffer from epidemics (of what nature I know not) and die by the million on the surface of the ground. Your ruby paper answers capitally, but I suspect that it is only for dimming the light, and I know not how to illuminate worms by the same intensity of light, and yet of a colour which permits the actinic rays to pass. I have tried drawing triangles of
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F1548.2
Book:
Darwin, Francis & Seward, A. C. eds. 1903. More letters of Charles Darwin. A record of his work in a series of hitherto unpublished letters. London: John Murray. Volume 2
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PDF
depth of four or five or six feet is certain, as the worms retire to this depth during very dry and very cold weather. As worms devour greedily raw flesh and dead worms, they could devour dead larvae, eggs, etc., etc., in the soil, and thus they might locally add to the amount of nitrogen in the soil, though not of course if the whole country is considered. I saw in your paper something about the difference 1. The late Sir J. Gilbert, of Rothamsted. 2. The first Report on Agricultural, Botanical
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