Annual Report of the Board of Regents of the Smithsonian Institution

American amount animals appears Aurignacian become birds called carried cent close collection color complete Congress connection containing continued crystal deposits determined direction discovery distance Dordogne earth effect electric elements energy existence experiments fact feet figures force give given glaciers greater height important increase industry Institution interest islands kilometers known land less light limited liquid lower March mass material matter means meters method minerals mountain Museum nature necessary observations obtained occur origin oscillations pass period plates positive possible practical present pressure probably problem produced publications question reached received regard region relations remains Report represented rocks scientific Smithsonian species surface temperature theory tion United various volume wave wind