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Seite 431 - HOW TO DRAW A STRAIGHT LINE : a Lecture on Linkages. By AB KEMPE. With Illustrations. Crown 8vo.
Seite 162 - Mineralogical Magazine and Journal of the Mineralogical Society of Great Britain and Ireland.
Seite 419 - LIGHT: a Series of Simple, entertaining, and Inexpensive Experiments in the Phenomena of Light, for the Use of. Students of every age.
Seite 352 - It is now generally admitted by biologists who have made a study of the vertebrates, that Birds have come down to us through the Dinosaurs, and the close affinity of the latter with recent Struthious Birds will hardly be questioned. The case amounts almost to a demonstration, if we compare, with Dinosaurs, their contemporaries, the Mesozoic Birds. The classes of Birds and Reptiles, as now living, are separated by a gulf so profound that a few years since it was cited by the opponents of evolution...
Seite 132 - I do not, however, believe that if all known plants were tried in the same manner, half would be found to be sterile within the specified limits ; for many flowers were selected for experiment which presented some remarkable structure ; and such flowers often require insectaid."— (p.
Seite 62 - But such a personification of "force" is a remnant of barbaric thought, in no wise sanctioned by physical science. When astronomy speaks of two planets as attracting each other with a " force " which varies directly as their masses and inversely as the squares of their distances...
Seite 1 - Contributions to Meteorology: being results derived from an examination of the Observations of the United States Signal Service, and from other sources ; by ELIAS LOOMIS, Professor of Natural Philosophy in Yale College.
Seite 321 - Proceedings and Transactions of the Nova Scotia Institute of Natural Science, vol.