[84 and 85]

Jan 31- Feb 1 & 2d Red Cabbage circumnutation of Radicle (Left-Hand Spec) from 9° a.m Jan 31' to 9°. P.m Feb. 2d.

(Fig I) (no lettering)

Fig I

3. a. circumnutation of 2 traced on H. glass from … to

fully illuminated from above.

[calculation not transcribed]

[85v]

53 609

Ch 9

vigour these plants must have been. With respect to heavy seeds tending to produce fine plants, Mr Galton has proved shown that this holds good with Lathyrus odoratus; as has Mr A. J. Wilson with the Swedish turnip, ( Brassica campestris ruta baga.) Mr Wilson separated the largest & smallest seeds of this latter plant, and an equal number of the two lots

[sheet of paper pasted on:] equal number weighed in the ratio of 100 to 59, & he found that the seedlings "from the larger seeds took the lead and maintained their superiority to the last, both in height and thickness of stem"* (Back) (2)

Nor can this difference in the growth of the turnips seedlings be attributed to some of the heavier seeds having been of crossed and other the lighter seeds of self-fertilised origin for it is known that plants belonging to this genus are habitually intercrossed by insects.)

With respect to the relative period of germination of the crossed & self-fertilised seeds, a record was kept in only twenty one cases; & the results are very perplexing. Neglecting a one case in which the two lots germinated simultaneously.

[Cross and self fertilisation, pp. 353-4: "This fact shows how superior in constitutional vigour the crossed seedlings must have been, for it cannot be doubted that heavy and fine seeds tend to yield the finest plants. Mr. Galton has shown that this holds good with Lathyrus odoratus; as has Mr. A.J. Wilson with the Swedish turnip, Brassica campestris ruta baga. Mr. Wilson separated the largest and smallest seeds of this latter plant, the ratio between the weights of the two lots being as 100 to 59, and he found that the seedlings "from the larger seeds took the lead and maintained their superiority to the last, both in height and thickness of stem."* Nor can this difference in the growth of the seedling turnips be attributed to the heavier seeds having been of crossed, and the lighter of self-fertilised origin, for it is known that plants belonging to this genus are habitually intercrossed by insects.
With respect to the relative period of germination of crossed and self-fertilised seeds, a record was kept in only twenty-one cases; and the results are very perplexing. Neglecting one case in which the two lots germinated simultaneously, in ten cases or exactly one-half many of the self-fertilised seeds germinated before the crossed, and in the other half many of the crossed before the self-fertilised."]