From the book The Human Body and Health Revised by Alvin Davison, published in 1908 by Alvin Davison. This book has a copyright of 1908 by Alvin Davison and one in 1924 by American Book Company. The copyright was never renewed and therefore should be in the public domain.
Here's an illustration where the skull is cutaway to show the brain.
Yaslani, el kel, bionicteaching, and 29 other people added this photo to their favorites.
Digital Sextant 38 months ago | reply
Thanks. Used the brain part of the image here:
www.flickr.com/photos/digitalsextant/4587293562/
audreyschroder 17 months ago | reply
Thanks for sharing this! I used it on my company's blog: www.vapor4life.com/blog/musings-from-the-vaping-short-bus...