Spectrum analysis in its application to terrestrial substances, and the physical constitution of the heavenly bodies

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Longmans, 1872 - 662
 

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Strona 69 - The true law of refraction, that the ratio of the sines of the angles of incidence and refraction is a constant dei...
Strona 205 - In the year 1860, he published his memoir on the relation between the emissive and absorptive powers of bodies for heat, as well as for light, in which occurs the celebrated sentence : " The relation between the power of emission and the power of absorption of one and the same class of rays, is the same for all bodies at the same temperature...
Strona 629 - s map, determined by direct comparison with the map at the time of observation. In some cases an interrogation mark is appended, which signifies not that the existence of the line is doubtful, but only that its precise place could not be determined, either because it fell in a shading- of...
Strona 598 - The meteors to which we owe the annual display of falling stars on the loth of August are not distributed equally along the whole course of their orbit ; it is still possible to distinguish the agglomeration of meteoric particles which originally formed the cometary nucleus from the other less dense parts of the comet; thus in the year 1862, the denser portion of this...
Strona 377 - With a powerful spectroscope the light reflected from our atmosphere near the sun's limb edge would be greatly reduced in intensity by the dispersion of the prisms, while the bright lines of the prominences, if such be present, would remain but little diminished in brilliancy. This principle has been carried out by various forms of prismatic apparatus, and also by other contrivances, but hitherto without success.
Strona iii - SCHELLEN'S SPECTRUM ANALYSIS, in its application to Terrestrial Substances and the Physical Constitution of the Heavenly Bodies. Translated by JANE and C. LASSELL; edited, with Notes, by W. HUGGINS, LL.D. FRS With 13 Plates (6 coloured) and 223 Woodcuts. 8vo. price 28s. CELESTIAL OBJECTS for COMMON TELESCOPES.
Strona 597 - Instead of the comet, there now revolves round the sun a broad ring of meteoric stones, which occasion the phenomena we every year observe as the August meteors. Whether this ring be continuous, and the meteoric masses strewn along the whole course of the path of the original comet, or whether the individual meteors, as in the November shower, have not filled up entirely the whole orbit, but are still partially in the form of a comet, is in the transformation of a cosmical cloud through the influence...
Strona 147 - Bunsen flame or a weak spark, the spectrum observed is produced by some compound, probably the oxide of the difficultly reducible metal ; whereas at the enormously high temperature of the intense electric spark these compounds are split up, and thus the true spectrum of the metal is obtained. In none of the spectra of the more reducible alkaline metals (potassium, sodium, lithium) can any deviation or disappearance of maxima of light be noticed on change of temperature.
Strona 646 - This paper gives the wave-lengths of the principal lines of the Solar Spectrum. On Wave-lengths. Silliman's Journal, March 1869. GLADSTONE, JH Notes on the Atmospheric Lines of the Solar Spectrum, and on certain Spectra of Gases.
Strona 372 - ... as consisting of separate rays, others give to it an almost true geometrical contour; in some of the Spanish sketches a tendency to assume a roughly quadrangular form can be detected, while in most of the Sicilian drawings there is a tendency to an annular form. We pass to the spectroscopic observations of the corona and halo. Prof. Winlock, using a spectroscope of two prisms on a five and a half inch achromatic, found a faint continuous spectrum. Of the bright lines, the most persistent was...

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