29.1 MB (1.9 MB compressed)
4006 x 2537 pixels
34.0 x 21.6 cm ⏐ 13.4 x 8.5 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Illustration of the pineal gland from a book by Rene Descartes entitled De Homine, published after his death in 1662. The book is regarded as the first textbook of physiology. Descartes believed that the pineal gland, marked H in this picture, was the seat of the soul. A French philosopher and mathematician, Descartes was born in 1596 and died, in Sweden in 1650.
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