Explains source of error [in Earthworms].
Explains source of error [in Earthworms].
Supports the statements on Henry Hicks in JL’s address.
Bonney is an "objector general".
CD has always supported A. C. Ramsay.
It is impossible to trace the direct connections between stimuli and responses in plant movements. Disagrees with much of Julius von Wiesner [Die Bewegungsvermögen der Pflanzen (1881)]. Disagrees with CD on induced movements and circumnutation.
Praise for Earthworms.
Discusses additional printing of Earthworms.
Sends his observations on the behaviour of a worm. They seem to indicate some sensory apparatus enabling it to "see".
Would like to cite the case of the celt in a new printing of Earthworms. Asks for details.
Sends CD an abstract of his 1871 paper on the earthworm, and requests information on the phenomenon of luminosity.
Can CD explain why in a mollusc (Bulimus decollatus) immature forms are always broken at the apex.
Summarises letter of William Nation [13350]. The facts given strongly support the conclusion that there is some close connection between the parasitic habits of birds that lay their eggs in others’ nests and the fact of their laying eggs at "considerable intervals of time".
"Roots often run down worm burrows, but can penetrate the ground without such aid."
Describes the soil in which he found prehistoric tools.
Thanks CD for his letter and gives permission to use his observations, although not considering himself a worthy authority. Enlarges upon some of his previous observations.
Cannot explain worm behaviour observed by AEG. Cannot believe in power of vision. Inclined to speculate on capacity for distinguishing damp air.
Comments on two letters received from W. F. P. Pfeffer [13425, 13464] who thinks Julius Wiesner’s view that light, etc. acts directly on plants is wrong.
Is frantic over the number of letters received about worms; feels the enthusiasm of the reception of Earthworms is laughable.
Is confounded by Euphorbia rootlets and has re-examined the effect of carbonate of ammonia.
Has thought of three good experiments to oppose Wiesner.
Thanks for Earthworms.
Explains that the animals in the cask cannot have developed from the wheat.
CD has misunderstood his views on heliotropism. Agrees that his experiments on the movement of root tips are weak. Will conduct further research. Thinks that since mechanical conception of botany is not so widespread, those who agree with CD probably are in majority.
Discusses GJR’s controversy with the Duke [of Argyll] concerning Roux’s book [Der Kampf der Theile im Organismus (1881)].
Progress of his and Frank Darwin’s work; "all natural science seems now to depend on section-cutting".