The Popular Science Monthly, Opseg 44

American animals appear become birds called cent century cephalic index Circassian Claude Chappe course Cro-Magnon earth ethical evil evolution existence experiments fact feet fruit G. P. Putnam's Sons geological give Glacial Glacial period glaciers hand heat Herbert Spencer human hundred Huxley ical Ice age idea illustrated important inches interest Jean Rey JOHN TYNDALL labor land lectures less light liquor living means ment method miles mind moral natural North observations organism origin oyster paper persons plants Popular Science Monthly possession present Prof published pupils question race result rocks schools scientific society South species surface theory things thought thousand tion Tyndall uniformitarians University valley vessel volume whip-poor-will whole woolly rhinoceros writing York