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American Journal analytical geometry animals annelide appears argillaceous earth become birds chemical color commission condition conscience contraction cookery Cooking-School course creosoted crystals diurnal motion embryos energy English Eocene evolution existence experiments fact flowers force Fossil frugivorous fruits gymnasia gymnasium heat human idea important Journal of Science Laplace large number less Mammals Marsh mathematics matter means ment mental method millimetres mind months moral motion natural nebular hypothesis nutriment O. C. MARSH object observations Odontornithes organic origin physical pieces plant precious stones present primitive produced Prof protoplasm pupils question red fir regard rotation rubies satellite scientific seeds sense silicic acid Sir John Lubbock solar solar nebula sound specific Stavoren substance surface tained teachers teaching teredo Tertiary things tidal tion vital wood words Yale College