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Albert Tissandier American anatomy ancient animal anthropology appear artistic Berlin cactus cave dwellings century changes cholera coal collection color conservation of energy considerable culture cure Darwin dendrites diphtheria disease doctrine dogs electricity especially essay ethnography evaporation evolution existence experiments fact factor feet geologists geology Greenland grottoes growth HAROLD WAGER heat Herr hundred hunter illustrated important interesting laboratory leaves legend living lungs matter ment metabolism methods museum natural nutrition objects observation organic origin PAOLO MANTEGAZZA paper persons phenomena physical physical anthropology plants pneumonia poisons potential energy prehistoric present prickly pear processes produced Prof race rest-harrow rock rooms scientific seen skin skulls Social Statics Society soil specimens Spencer stone story theory thought tion tissues tree Uncle Remus University ventilation Vlach white cows whole York