Various, Popular Science Monthly (1910)
“ No one knew what caused the newly hatched young of the great sea-turtles to crawl toward the ocean as soon as they had dug their way upward out of the sand within which their eggs are laid, but Dr. Davenport Hooker, of Yale, found that the young turtle is attracted toward the ocean by the blue color of the water. If it sees the ocean through red, yellow or green glass it does not crawl toward it, but if a piece of blue glass, or even blue paper, be placed anywhere within range of its vision the turtle at once scuttles toward it with great excitement. ”
