The mechanistic conception of life : biological essays (1912)
Loeb, Jacques, 1859-1924 · Chicago, Ill. : University of Chicago Press · leaf 63
of natural selection. I have made experi-ments upon a large number of animals, but, with a clear … Fig. 21.—Arrangement to prove that posi-tively hello tropic animals move toward the sourceof light even if by so doing they go from the sim-light into the shade. W W is & window throughwhich smihght S falls into the room. By a pieceof board d e the sunlight 5 is prevented fromstriking the…
