Researches on the solar spectrum, and the spectra of the chemical elements, tr. by H.E. Roscoe, Band 2,Teil 2 |
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2b Ca 3b Fe 4c Fe 5b Ca 6b Na account accurate addition allowed already apparatus Appendix arranged ATMOSPHERIC LINES blue breadth bright lines brighter brought Cambridge catalogued CHEMICAL ELEMENTS cobalt coincident with Fraunhofer's dark lines dark solar lines degree of brightness didymium direct comparison distinguished double line drawing electric spark electrodes employed examined faint Fraunhofer's lines gases half Hence Hofmann incandescent gas intense investigated knowledge La,Di lanthanum large number less refrangible light likewise lines appeared Lines represented MACMILLAN magnifying power marked metals nickel notice obliged observations obtained occur pair Plate I.a portions position possible potassium spectrum prisms PROFESSOR published red potassium line remark render RESEARCHES ROSCOE salt scale seen slit solar atmosphere solar spectrum spark passed spec spectra spectrum lying STRIP Sun's TABLE telescope trum UNIVERSITY visible whilst yellow yielded бе За
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Seite 1 - KIRCHHOFF. — Researches on the Solar Spectrum and the Spectra of the Chemical Elements.
Seite 5 - G on the other, and in addition investigated the spectra of the following metals : — Potassium, rubidium, lithium, cerium, lanthanum, didymium, platinum, palladium, and an alloy of iridium and ruthenium. Hofmann added the following coincidences between 1 " Researches on the Solar Spectrum.
Seite 6 - Kirchhoff's, his own eyesight having been too much injured by his previous observations to allow him to continue the investigation. The new metals examined consist of potassium, rubidium, lithium, cerium, lanthanum, didymium, platinum, palladium, and an alloy of indium and ruthenium. These additional observations have not yielded any new information respecting the constituents of the solar atmosphere ; they have, however, confirmed the results of the previous examination. Potassium, which was formerly...
Seite 6 - ... previous examination. Potassium, which was formerly considered to give lines identical with some in the solar spectrum, now appears to be absent from that luminary ; a few coincidences have also been observed in the spectra of strontium and cadmium, but their number is too small to warrant the conclusion that these metals are present in the sun's atmosphere. * ' Poggemlorff 's Annalen,