The Popular Science Monthly, Volume 42

alveolar arch American ancient animals appears archæology become birds body bones cause cent century character cholera cities civilization color comet discovery disease dolmens England especially evidence evolution existence experiments fact feet flowers G. P. Putnam's Sons geological germ layers ghost give glacial glass Greece hand head Herbert Spencer human hundred Ice age idea important industry insects interest Israelites knowledge labor land larvæ less living mackerel marriage means ment mental method microcephalic mind natural natural selection nickel observed organization origin paper physical plants population possession practical present production Prof question race recent regard says scientific seems side skull society spirillum spirit stone theory things thought tion tree trepanned tumulus University whole York young