Showing 81–100 of 186 items
[Queries in CD’s hand answered on same pages by WBT.] Sexual selection of fowls; role of beauty in cocks.
Sends MS on fowls for WBT’s inspection.
Asks for return of his MS [unspecified].
Orchids taking up all his time.
He longs to be at work again on poultry and rabbits.
Testimonial in support of WBT’s application for curatorship of the Hartley Institution.
WBT’s "too kind and flattering" article on Orchids.
CD interested in hybrid sterility and encloses his preliminary MS. Outlines experiments to test for existence of sterility in breeds of poultry and pigeons.
Experiments on dimorphism have led him to change in part his opinion as given in Origin, and he is now asking pigeon and poultry fanciers for any examples of special selective sterility [i.e., a particular pair are sterile when crossed, but each individual is fertile with others] and hopes to investigate its inheritance.
Can WBT help get an answer to a query on ducks?
Has heard of a case of special sterility in cattle, in which a particular pair are sterile, but the individuals are both fertile with others.
Has WBT ever heard of a case of the regeneration of monstrous (extra) toe on fowls?
Inquires about a curious pigeon reported at the Philoperisteron [pigeon fanciers’ club].
Does not believe in regeneration of monstrous toe.
Pigeon and poultry experiments.
Peculiar pigeon at Philoperisteron [pigeon fanciers’ club].
Hoped to meet CD at the Linnean Society to discuss pigeon and poultry breeding experiments.
Discusses experiments that WBT will undertake to investigate whether particular pigeon and poultry crosses produce sterile hybrids.
Progress of pigeon and poultry breeding experiments. No loss of fertility observed yet.
Blue-eyed cats and deafness.
WBT progressing with breeding experiments for CD.
CD making quicker progress with Variation.
Encloses a cutting from the Field: C. R. Bree on zebra-striped asses.
Would like his fowl skulls back.
Breeding experiments seem to show mongrels are just as fertile as pure breeds.
Returns WBT’s box of skulls. One or two skulls may be elsewhere, but CD does not have the strength to search for them.
Sends paper on mimetic analogy [Intellect. Obs. 6 (1864): 307–13].
Mongrel experiments are progressing, but he has observed no signs of sterility.
CD working on Variation; he will soon want corrected fowl MS [Variation, ch. 7].
WBT’s breeding experiments produced no sterility.
Wants his fowl MS.
Will shortly return WBT’s skulls.