(94

Tobacco in greenhouse 1867

Nicotiana tabacum

12 flowers crossed gave 10 pods & 5 pods contained by weight only 14.40 gr. of seed.

12 fl. self-fert. gave 11 pods & 5 pods contained 25.78 gr. of seed; so very much fewer, more as far as 5 pods serves.

I was so much surprised at this result that I cleaned 5 more pods of each sort. & now

10 crossed pods weighed 31.70 gr of seed

10 self-pods [do] 47.67 gr.

So self much more fertile!!!

(May 20' 68/ In Pot 2 & 3 the self- finest plants.)

(July 9th 68. Tallest plant on each side measured

[Table partly excised, not transcribed] The Pots were rather small, so plants did not nearly attain full height─

In all selfs flowered first

Plant crowded in this Pot

During Oct. or November I sow 2 Pots A & B thickly with some of same seed to see if any mistake, & now Dec 6 /68/ the plants to tips of leaves are 13-14 inches & no marked difference in either Pot on either side.— /over

[94v]

Jan 24 /69/ In Pot A (of bottom of last page)

Tallest crossed plant to tip of leaves 18 1/2 inch

[do] self [do] [do] [do] [do] 22

22 [-] 18. 1/2 [=] 3.1/2

In Pot B tallest crossed [do] [do] [do] 26 1/2

[do] Self [do] [do] 24 1/2

These plants were very crowded, & selfs no decided advantage, & in former experiment the very crowded plants did not show so much inequality, which is exactly reverse of all ordinary cases. —

(June 15. 1869 I also raised some plants from same seed as above, for the sake of fresh crossing & kept 2 plants in each large Pot in Hothouse, [text excised]

now plants are [text excised]

selfs are 2 [text excised]

crossed plants. —

94

[calculations not transcribed]

(95

Tobacco— Early in June 1868 9? — 12 fl. carefully crossed by plants in adjoining pots whilst young & 12 carefully self-f[text excised]

produced pods— 2d Generation?? Seed must be caref[text excised]

seed from 10 crossed weighed 3 [text excised]

― do self-pods ― 3 [text excised]

So that greater fertility of self-fer[text excised]

error or at least not [text excised]

Aug. 16. 69— the above seed pla[text excised]

(Sept 2 69. The crossed have germinated [text excised]

but I believe that seeds from diff[text excised]

constitutions; for a certain [text excised]

germinated before the other crossed [text excised]

(see over for measure [text excised]

Plants when full-

[95v]

May 2d 1870

[text excised] N. B The Plants in flower measured to tip of calyx, & those not so to tip of axis.

[Table partly excised, not transcribed]

95

[calculations not transcribed]

(95A

Tobacco. 1870

The 2 self Plants in Pot III A & B of last page, which were much taller than 3rd Generation the 2 crossed plants in same pot, had each 4 flowers fert. with own, & 3 on each self-fert plant fert. with pollen from same o some crossed plant in another Pot.— The seed from each pod put separately in watch glasses, & from both plants there certainly seemed rather more seed in the self-fert. Pot pods than in the crossed. (see next Page 95 B for measurement)

(95B

Tobacco March 10' 1871. Two self-fertilised plants, marked A & B (see last page for parent— were again self-fertilised & crossed by other crossed Plants, & from both these plants, seedlings 3d generation were raised of which the following are measurements up to tips base of tip & calyx.

[Table partly excised, not transcribed] (N.B The little plant measured to tips of leaves)

95B

[calculations not transcribed]

(95C

Tobacco. Self plants in Pot B II. & in B III 5 (see p. 95 B) were self-fertilised & crossed by a dwarf Plants raised from seed from Cattell 4th Generation — see memorandum on opposite page of its nature,

In From Pot B 5, 5 crossed pods were obtained & 4 art self-fert pods obtained & placed in watch-glasses: the seed in the self clearly appeared the most abundant; so that when all the crossed & self- seed were placed in 2 glasses, that from the 4 c selfs exceeded that from the 5 crossed—

In From Pot B II. 2 crossed & 2 art self-pods were procured, & here the one finest pods was a self, but the 2 crossed exceeded the 2 selfs—

Manifestly no gain, apparently a loss of, fertility by the cross from Cattell's Plants

(April 20 1871. — But the seed from flowers crossed by Cattells plant which grew in Pots B2 & B5 germinated very decidedly quicker & in much greater number than in the 2 self- compartments on the sand — Many radicles with hairs whilst not one on the 2 self sides in this state.—

April 22d. Difference now more conspicuous many young plants on the 2 compartments crossed by Cattell showing much green, whilst hardly one on the 2 self- sides.)

(May 22 /71/ In the 2 crowded Pots of both parentage, the young plants from cross by Cattells plant, have much finer & broader leaves.)

(95D

Tobacco 1871 Two lots of plants raised from the self & crossed (by Cattell's pollen) 1871— summer & autumn, specified on p. 95 C. from two plants, as on (p. 95. B.)

Plants raised from Pot B II.

[Table partly excised, not transcribed]

(Mr Norman do ink the figures in the columns in pencil)

(see over)

[95Dv]

I committed a mistake in leaving plant which were not in flower to flower, for they have grown unfairly in being left by themselves, the crossed having been cut down, But now Sept 22d- about 3 to 4 weeks after former measurements were made, I ha[text excised]

all to tips of leaves — (& there are [text excised] wh[text excised]

fair, as calyx of flower hardly does not ex[text excised]

straighten leaves. — (But [text excised]

may use flowers, stating [text excised]

been thus favoured. — No [text excised]

It will be seen that in all Pots [text excised]

the crossed by Cattells flowered fir[text excised]

cover the 2 Pots in which pla[text excised]

whilst young.

95D

[calculations not transcribed]

B2

In Pot VI. Self fert. I have reckoned one plant at 92 2/8

[127]

Dec. 29 /70/ The tobacco which I have experimented on is N. tabacum. —

Cattells plant to be used now for crossing is certainly same sp. but leaves rather more pointed leaves & flowers a little pinker pinker, but identical in all other respect— except rather dwarfer plants, height being (almost in flower) only 41 4/8 inch to tip of highest leaf — whereas measurement to be made (& given on p. 95 B) will show height of stem very old plants — There is was nothing in in conditions which will account for this smaller size — over

[127v]

Self-plants will be again self-fert, & will be crossed with Cattell's plant.

(95E

Tobacco, 1871 cont. from last page.—

Plants raised from Pot. B5.

[Table partly excised, not transcribed]

Those which are marked on both sides in ink perhaps ought to when really measured to tips of leaves ought to have taken off th taller one, which alone flowered.

(N B. ends of sepals from 1 1/2 to 3 inches beyond tips of leaves— so subtract , if leaves used)

95E

[calculations not transcribed]

(B5) greater difference

[130]

[calculations not transcribed]

[130v]

[Draft fragment of Descent vol. 2, folio 57.]

(57

(Colour mammals)

has the face of a pale red face & a large surface of naked skin round the tail of a brilliant carmine red, which periodically becomes, as I was assured by the keepers in Zoological Gardens, even more vivid; In one on the other hand in a fully adult male which & in the in some young animals which I saw in the Gardens there neither neither the face nor nor the naked skin at the posterior end of the body showed a trace of the red colour. but From From some accounts, however, it appears that the male occasionally or at certain seasons does seasons does show more trac traces of the red, colour tints. In the Macacus cynomolgus, the female has a well-developed longitudinal crest of hair on her head which is quite absent in the adult male, although a rudiment of it may be observed in the young male in his second year, whilst young.*(51) This case latter circumstances is curiously parallel with the case of the male given in a former the chapter on birds, in which it was shown that the female that the males of in the Goosander (Merganser Castor) the adult female & young male have a longer which whilst young, has an elongated crest of feathers, like that on the head of the adult female; but that the crest, differently to the unlike what occurs in any other bird, this becomes shorter as the male grows older. Although the males

[The text of this draft corresponds in part in Descent 2: 189 & 319-20.]

[131]

[calculations not transcribed]

95F

Tobacco 1871 Same lots as plants on p. 95 D & or E.

Seeds more or less germinated some very crowded in 2 Pots

[Table partly excised, not transcribed]

95F

[calculations not transcribed]

B2

B5 greater difference

(95G

Tobacco 1871. Summer wet & cold The seeds from which plants on 3 last pages were grown, were when more or less germinated sown planted or sown in open ground in 4 rows, moderately near & parallel; so case same as if seed had been sown in open ground, & as crossed by Cattells geminated soonest gave some advantage to this lot.

(July 15 1871 The seedlings now just above ground, quite minute, & in both sets crossed by Cattells plainly great advantage

[Table partly excised, not transcribed]

Red Cross means in flower or large exposed flower buds. Only 1 self in this state

It does not seem in comparison with 2 crowded Pots, that there is any rule of excess in Pots B 2 & B 5. — Add difference in constitution in the 2 lots — according as effects of crowding & exposure to unfavorable weather—.—

Measured November 11th 1871.

Leaves touched by frost

[95G]

Crowded

[calculations not transcribed]

[135]

[Draft fragment of the discussion in Descent 1: 178ff]

[top of page excised]

barrier

selection can act only in a [illeg] manner; for with man & other animals individuals & whole races in both of man & of other animals, may have had acquired certain indisputable advantages, & yet may have failed to su not increase in number or have wholly perished from failing in from having been inferior in certain other respects; but in the long run those individuals & races which inherit the greatest number of most advantages, under whatever circumstances they may happen to be exposed, during a long course lapse of time have been placed will ultimately prevail & multiply.

[bottom of page excised]

95G

[calculations not transcribed]

B2 greater difference

B5