The Popular Science Review: A Quarterly Miscellany of Entertaining and Instructive Articles on Scientific Subjects ..., Volume 4; Volume 19James Samuelson, Henry Lawson, William Sweetland Dallas R. Hardwicke, 1880 - Science |
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acid action animals Antedon appears astronomers beds birds body bone British carbon cells centimetres Chamæleon characters chemical climbing close colour comet compound containing crater Crocodilian crystals deposits described developed diameter Dinosauria Dinosaurs disc distinct earth electric Eocene Erasmus Darwin erbia existence fact feet Foraminifera formation fossils genera genus geological geologists gossan heat hydrogen Iguanodon Infusoria investigation latter less light limestone magnetic mass means meteors mineral Miocene Monera Morosaurus motion nature nearly observed obtained occur Oligocene orbit organisms oxide parasitic period Perseids phenomena pinnules plants plates Polypes position present probably produced Prof Professor protoplasm radiant point recent regarded remarkable represented reptiles resemblance rocks round satellites seen selenium shower side Silurian solar species specimens star stone strata structure substance Sunspots surface temperature tendril theory tion tube twining upper vertebræ wire Zanclodon
Popular passages
Page 156 - Whoever will follow these pages, crayfish in hand, and will try to verify for himself the statements which they contain, will find himself brought face to face with all the great zoological questions which excite so lively an interest at the present day.
Page 372 - ... the electric circuit connected with the selenium receiver, so as to place the telephones in another room. By such experiments we have found that articulate speech can be reproduced by the oxyhydrogen light, and even by the light of a kerosene lamp. The loudest effects obtained from light are produced by rapidly interrupting the beam by the perforated disk.
Page 379 - MARKHAM, Capt. Albert Hastings, RN— The Great Frozen Sea : A Personal Narrative of the Voyage of the Alert during the Arctic Expedition of 1875-6.
Page 264 - Sun at one focus. As a consequence, the angular speed of the Earth in its orbit is not constant; it is greatest at the beginning of January when the Earth is nearest the Sun. The other cause is due to the obliquity of the ecliptic; the plane of the equator (which is at right-angles to the axis of rotation of the Earth) does not coincide with the ecliptic (the plane defined by the apparent annual motion of the Sun around the celestial sphere) but is inclined to it at an angle of 23* 26*.
Page 83 - ooze." 2. That the deep-sea sponges, with their environment of protoplasmic matter, constitute by far the most important and essential factors in the production and stratification of the flints. 3. That, whereas nearly the whole of the carbonate of lime, derived partly from Foraminifera and other organisms that have lived and died at the bottom, and partly from such as have subsided to the bottom only after death, goes to build up the calcareous stratum, nearly the whole of the silica, whether derived...
Page 249 - the river-drift man first comes before us endowed with all human attributes, and without any signs of a closer alliance with the lower animals than is presented by the savages of today, " I think we must venture to suspend judgment for the present.
Page 370 - ... advisable to intermit the light with great rapidity, so as to produce a succession of changes in the conductivity of the selenium, corresponding in frequency to musical vibrations within the limits of the sense of hearing. For I had often noticed that currents of electricity, so feeble as...
Page 88 - Magazine that as the power of -a telescope is measured by the closeness of the double stars which it can resolve, so the power of a spectroscope ought to be measured by the closeness of the closest double lines in the spectrum which it is competent to resolve.
Page 370 - We find that when a vibratory beam of light falls upon these substances they emit sounds, the pitch of which depends upon the frequency of the vibratory change in the light. We find...