2 Items
Page: 1
From Bernard Peirce Brent [after August 1856]
Summary
On his breeding of Jacobin pigeons. How reciprocal crosses to produce mules work among canaries, goldfinches, linnets, and green linnets.
Will soon forward copies of Cottage Gardener for June.
| Author: | Bernard Peirce Brent |
| Addressee: | Charles Robert Darwin |
| Date: | [after Aug 1856] |
| Classmark: | DAR 160.2: 298 |
| Letter no: | DCP-LETT-2850 |
From Bernard Peirce Brent 15 July 1862
Summary
Continues breeding guinea-pigs to test effects of warmth on gestation period. Concludes period is ten weeks and warmth has no influence. Offers CD the specimens.
Awaits Variation.
| Author: | Bernard Peirce Brent |
| Addressee: | Charles Robert Darwin |
| Date: | 15 July 1862 |
| Classmark: | DAR 160: 301 |
| Letter no: | DCP-LETT-3660 |
