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Has been interested in copy of HD’s letter to H. T. Stainton on numerical proportions of the sexes of insects. Do they vary during different years?
Does he have opinions about the courtships of butterflies?
Will send a copy of his paper on Primula when it is published. [See 5997.]
Comments on the death of a number of friends, his own poor health, and how he spent the winter working through his double-star observations.
Offers enclosure demonstrating that natural selection could produce sterility of hybrids.
More on Pangenesis and the inadequacy of H. Spencer’s approach.
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Canine teeth in males are always larger than in females and certainly so in Cervulus moschus.
Thanks JEG for answering questions so fully and clearly, especially as he is troubled with his eyes.
Is engaged on an article for Fortnightly Review on Variation ["Mr Darwin’s hypotheses", n.s. 9: 353–73, 611–28; n.s. 10: 61–80, 492–509]. Asks CD some questions.
While he agrees with natural selection, he believes many "organic details" develop irrespective of advantage.
Thanks HTS for his valuable information. Hopes to arrive at probable answer to question of proportion of males to females in the progeny of butterflies bred in domestication.
On courtship of butterflies, CD believes something more than chance is involved in determining which male is successful.
Aggressive behaviour of a bullfinch toward new arrival in JJW’s aviary.
Sexual differences in goldfinches: size of beaks.
Sexual selection in Lepidoptera.
Thinks Dr Alex Wallace’s observations on Bombyx not conclusive in proving that no preference is shown by females.
Quotes information from Dr Power on colour of sexes of Crustacea in Mauritius [see Descent 1: 335].
Asks CD to collect from the Jermyn Street Museum a box containing a skull and bones which belong to Mr Cumberbatch.
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Now quite understands Pangenesis. Satisfaction given by it, as CD says, may depend on one’s mental constitution. In all cases of descent JDH has always thought "all the properties of the parents are transmitted in the one cell and were diffused to every part of the future offspring".
Tyndall believes he feels atoms as firmly as St Paul believed he saw Christ.
Sending him photographs and mounts for him to sign and return. Can keep one for himself. Remembers the day she spent with him.
JM offers a note for 400 guineas as author’s payment on sale of 1250 copies of 2d issue of Variation.