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Darwin, George H. "On the Secular Changes in the Elements of the Orbit of a Satellite Revolving about a Tidally Distorted Planet" pp 713-891; Huggins, Sir William. "On the Photographic Spectra of Stars" pp 669-690. Both papers found in: Philosophical Transactions, 1880. London, printed by Harrison and Sons, 1881, volume 171; (xii), 1092pp 51 plates and a folding plate of stellar spectra. Beautifully rebound in calf-backed and calf-tipped boards. The non-leather parts have been skillfully and ably lightly antiqued so that the volume doesn't look surprisingly brand-new. Excellent craftsmanship. [++] Huggins was a pioneer in astrophysical spectroscopy as well as astronomical photography. This is still an early paper on the subject of the spectra of stars given that it is only eight years passed since Henry Draper resolved the first spectra of a star other than the Sun. [++] The paper by Darwin is his "resonance theory" of the formation of the Moon although the theoretical aspect of the work is outdated, the experimental and aspects and thought processes are still significant. "Darwin's most significant contribution to the history of science lies in his pioneering work in the application of detailed dynamical analysis to cosmological and geological problems. That many of his conclusions are now out of date should in no way diminish the historical interest of his experiments, nor the important service that he rendered cosmogony by the example he gave of putting various hypotheses to the test of actual calculations. Darwin's method remains a milestone in the development of cosmogony, and subsequent investigators have favored it over the merely qualitative arguments prevalent until that time. That Darwin s scientific work is homogeneous is apparent from glancing at the titles of the more than eighty papers collected in the four volumes of his Scientific Works. After publishing some short notes on a variety of subjects, he devoted himself steadfastly to the problems of mathematical cosmogony, departing from them only to undertake problems of pressing practical concern (as, for example, in his work on oceanic tides). The greatest part of his work is devoted to the explanation of the various aspects of the history of the double stars, the planetary system, and satellite systems. His papers on viscous spheroids (including those on tidal friction), on rotating homogeneous masses of fluids, and even those on periodic orbits are means to this end."--Complete DSB online [++] Also in this large volume are: On the Determination of the Rate of Vibration of Tuning-Forks by Herbert M Leod and George Sydenham Clarke. The Contact Theory of Voltaic Action, Paper No. III, by Professors W. E. and John Perry. Researches on the Comparative Structure of the Cortex Cerebri by W. Beyan Lewis. On some recent Improvements made in the Mountings of the Telescopes at Birr Castle, by the Earl of Rosse. Researches on Explosives No. II. Fired Gunpowder, by Captain Noble. Double Refraction and Dispersion in Iceland Spar: an Experimental Investigation, with a comparison with Huyghen's Construction for the Extraordinary Wave, by R. T. Glazebrook. On the Motion of Two Spheres in a Fluid, by W. M. Hicks. On the Sensitive State of Vacuum Discharges, Part II, y William Spottiswoode. The Bakerian Lecture. On the Photographic Method of Mapping the least Refrangible End of the Solar Spectrum, by Captain W. de W. Abney. And numerous others.
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