Showing 1–12 of 12 items
Thanks for AdeC’s Histoire des sciences [1873].
Sends a copy of Expression.
His health keeps him weak; he dreads grappling with the fearful subject of variation [in nature]
so he is working up some observations in botanical physiology to publish with his old papers on climbing plants.
Thanks AdeC for great pleasure his new book [Histoire des sciences (1873)] has given him. Comments on several of the essays.
When AdeC backs up Asa Gray in saying all instincts are congenital habits, CD must protest.
Asks several questions about butterflies of the Alps discussed on p. 322 [of Histoire].
The evidence of tameness of Alpine butterflies [see 8672] seems good and the fact is surprising to CD for they can hardly have acquired this in their short life-time.
The question whether butterflies are attracted to bright colours independently of the supposed presence of nectar is still unanswered.
CD has great difficulty in believing that any temporary condition of parents can affect the offspring.
Pangenesis is much reviled, but CD must still look at generation from this point of view, which makes him averse to believing that an emotion has any effect on the offspring.
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Will be interested in reading AdeC’s paper on Smilax. The transition from hermaphroditic to unisexual condition is a perplexing problem.
CD agrees that there is much justice in AdeC’s criticism of his use of the terms "object", "end", and "purpose" but thinks "those who believe that organs have been gradually modified by natural selection for a special purpose, may I think use the above terms correctly though no conscious being has intervened".
CD and Francis are hard at work on the function of "bloom" but CD doubts that the experiments will tell them much.
Does AdeC have a decided opinion on whether plants with glaucous leaves are more frequent in hot or dry than in cold or wet countries?
Francis has been getting "striking" results from feeding meat to Drosera.
AdeC’s two letters on bloom will be very useful; his remarks on evaporation and absorption seem very just. CD has made few experiments as yet. The investigation has been tedious and difficult.
CD cannot say he cares greatly about his election to the Institut but he does care for the sympathy of his friends.
Will look to Smilax when he returns to Down.
Regrets the insecurity of the identification of fossil leaves.
He has heard that De Bary has cultivated Utricularia with and without aquatic animals and that the plants that have been fed flourished "in a stupendous manner".
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