
Bunker Hill Monument
1875 · Albumen print (carte-de-visite)
Image: 8.9 × 5.7 cm (3 9/16 × 2 1/4 in.); Card: 10.4 × 6.4 cm (4 1/8 × 2 9/16 in.)
Art Institute of Chicago
Joel Asaph Allen was an American zoologist, mammalogist, and ornithologist. He became the first president of the American Ornithologists' Union, the first curator of birds and mammals at the American Museum of Natural History, and the first head of that museum's Department of Ornithology. He is remembered for Allen's rule, which states that the bodies of endotherms vary in shape with climate, having increased surface area in hot climates to lose heat, and minimized surface area in cold climates, to conserve heat.
Source: Smithsonian Institution · Trust score: 90% · Updated 1mo ago