L'università fireside di invenzione moderna, scoperta, industria e arte per lo studio domestico del cerchio e l'intrattenimento. Lui Sodiums luce allo stesso tempo, he madethe Fraunhofer linee si adattano l'una all'altra. In questo modo ha coperto la presenza di Sodio, ferro, Calcio, Magnesio, nichel, Bario, rame, zinco e cobalto al sole. Perché le linee solari sono scure, mentre Gli stessi Elementi^bruciano sulla terra, lanciano linee luminose? Si spiega sulla teoria che Il Sodio, bruciandosi sul thesun, fa un'ombra rispetto al potere vivido della luce intorno ad esso. Il poeta persiano imaginedla gloria di Dio a.

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The fireside university of modern invention, discovery, industry and art for home circle study and entertainment . he Sodiums light at the same time, he madethe Fraunhofer lines fit on one another. In this way he sug-gested the presence of Sodium, Iron, Calcium, Magnesium, Nickel, Barium, Copper, Zinc and Cobalt on the sun. Why are the suns lines dark, while the same Elements^burning on earth, throw bright lines ? It is explained on the theory that Sodium, in burning on thesun, makes a shadow by comparison with the vivid power of the light around it. The Persian poet imaginedthe glory of God to be such that the sunitself was His shadow. Did the study progress ? Very rapidly. Professor Crookes, ofthe celebrated X Ray tubes, was one ofthe most successful experimenters, succeed-ing in lighting the Elements by the electricspark and noting the map of their Spectra.In 1861 he thus discovered Thallium. What ^wonderful result followed? The Spectroscopists found lines on thesuns Spectrum that were not present in anylight given on earth. They thereforenamed the two sources of these Lines Helium and Coronium.. Fig. TO. HERRMANNSHEMOSCOPE, or BLOOD-TESTING APPARATUS. THE SPECTROSCOPE: 219 Helios is the Greek name for the sun. In 1895 Lord Rayleigh, who had isolated the Element Argon, a gas, announced that inisolating Argon he had found the Spectrum of Helium, andsoon Helium was isolated by several chemists. Thus one of ourElements was first recognized at a distance of ninety-five millionmiles from the earth. No Gold is found on the sun. Are the Stars studied? Yes. They have been classified into stars like our sun thatshow many metals. Capella, in the Constellation Auriga, showsmany metals. There is a large class like Sirius, that show moregas than our sun, principally Hydrogen. The third class showIron, and their Lines are like those of the suns spots. They arebelieved to be cooling into a molten condition. What is the most interesting result of the Spectral Analysisof tlie stars

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1900
• booksubjectscience
• bookyear1902