Journal of the Chemical Society 1907/II. [antikvár]

JOURNAL Oi THE CHEMICAL SOCIETY. ABSTRACTS OF CHEMICAL PAPERS PUBLISHED IN BRITISH AND FOREIGN JOURNALS. PART II. General and Physical Chemistry. The Spectra of Hydrogen. A. Dufoub (A7in. Chim. Phys., 1906, [viii], 9, 361—432).—As the result of an exhaustive series of experiments, the author finds that the spectrum of chemically pure hydrogen consists of the two well-known spectra, the first composed of the stellar lines Ua, Hf3, By . . ., and a second, which contains a greater number of lines, chiefly in the yellow; the second spectrum is not due to the chemical nature of the electrodes or to foreign gases (water vapour, hydrocarbons) which might be occluded on the wails of the Geissler tubes, and the same results were obtained when the glass tubes .were replaced by tubes of silica or boric anhydride (Dufour, J. de phys., 1903, [iv], ii, 498). A complete bibliography of the subject is given, and the various theories advanced in explanation of the nature of the second spectrum are discussed. M, A. W. Band Spectrum of Nitrogen in a Strong Magnetic Field. John E. Puevis {Proc. Camb. PUl. Soc., 1906, 13, 354—355).— Experiments made with a magnetic field strength of 41,000 units confirm the earlier observation of Becquerel and Deslandres {Compt. rend., 1898, 127, 20), who, working with a weaker field, could not detect any appreciable division or wideniug of the bands. The vibrations which VOL. XCII. ii, 1