Comparison with 1860 |
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Text in this page (from paragraph 1900, sentence 520, word 10 to paragraph 1900, sentence 540, word 34) is not present in 1860 |
Hence
I have very little doubt, I have very little doubt, 1859 1860 |
we may infer as highly probable 1861 1866 1869 1872 |
that
if the whole genus of humble-bees became extinct or very rare in England, the heartsease and red clover would become very rare, or wholly disappear. The number of humble-bees in any district depends in a great degree
on the number of field-mice, which destroy their combs and nests; and Mr. H.
Newman, who has long attended to the habits of humble-bees, believes that "more than two thirds of
them
are thus destroyed all over England." Now the number of mice is largely dependent, as every one knows, on the number of cats; and Mr. Newman
says, "Near villages and small towns I have found the nests of humble-bees more numerous than elsewhere, which I attribute to the number
of
cats that destroy the mice." Hence it is quite credible that the presence of a feline animal in large numbers in a district might determine, through the intervention first of mice and then of bees, the frequency of certain flowers in that district! |
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In the case of every species, many different checks, acting at different periods of life, and during different seasons or years, probably come into play; some one check or some few being generally the most potent,
but all concurring
in determining the average number or even the existence of the species. In some cases it can be shown that widely-different checks act on the same species in different districts. When we look at the plants and bushes clothing an entangled bank, we are tempted to attribute their proportional numbers and
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2,700 seeds, but the same number of protected heads produced not a single seed. Humble-bees alone visit red clover, as other bees cannot reach the nectar. It has been suggested that moths may
serve to serve to 1861 1866 | serve to 1869 1872 |
fertilise the clovers; but I doubt
this this 1861 1866 |
whether they could do so 1869 1872 |
in the case of the red clover, from their weight
being apparently not being apparently not 1861 1866 |
not being 1869 1872 |
sufficient to depress the
wing-petals. wing-petals. 1861 1866 1869 | wing petals. 1872 |
Hence
we may infer as highly probable we may infer as highly probable 1861 1866 1869 1872 |
I have very little doubt, 1859 1860 |
that that 1859 1860 1861 | that, 1866 1869 1872 |
if the whole genus of humble-bees became extinct or very rare in England, the heartsease and red clover would become very rare, or wholly disappear. The number of humble-bees in any district depends in a great
degree degree 1859 1860 1861 1866 1869 | measure 1872 |
on the number of field-mice, which destroy their combs and nests; and
Mr. H. Mr. H. 1859 1860 1861 | Col. 1866 1869 1872 |
Newman, who has long attended to the habits of humble-bees, believes that "more than
two-thirds two-thirds 1860 1861 1866 1869 1872 |
two thirds of 1859 |
of them of them 1860 1861 1866 1869 1872 | them 1859 |
are thus destroyed all over England." Now the number of mice is largely dependent, as every one knows, on the number of cats; and
Mr. Newman Mr. Newman 1859 1860 1861 | Col. Newman 1866 1872 | Col.Newman 1869 |
says, "Near villages and small towns I have found the nests of humble-bees more numerous than elsewhere, which I attribute to the
number number 1859 1860 1861 1866 1872 | numbe 1869 |
of of 1859 1860 1861 1866 1872 | r of 1869 |
cats that destroy the mice." Hence it is quite credible that the presence of a feline animal in large numbers in a district might determine, through the intervention first of mice and then of bees, the frequency of certain flowers in that district! |
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In the case of every species, many different checks, acting at different periods of life, and during different seasons or years, probably come into play; some one check or some few being generally the most
potent, potent, 1859 1860 1861 1866 1869 | potent; 1872 |
but all
concur concur 1860 1861 1866 1869 | concurring 1859 | will concur 1872 |
in determining the average number or even the existence of the species. In some cases it can be shown that widely-different checks act on the same species in different districts. When we look at the plants and bushes clothing an entangled bank, we are tempted to attribute their proportional numbers and
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