From:
Asa Gray
To:
Charles Robert Darwin
Date:
15 July [1862]
Source of text:
DAR 110 (ser. 2): 116, DAR 165: 113
Summary:
Observations on Platanthera.
Possibility of trimorphism in Mertensia.
Contributor:
Darwin Correspondence Project
From:
Bernard Peirce Brent
To:
Charles Robert Darwin
Date:
15 July 1862
Source of text:
DAR 160: 301
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.
Contributor:
Darwin Correspondence Project
