Brongniart (Charles). Note sur des perforations observées dans deux The Author. Constantinesco (D.). Philosophie de la Nature. Apogée des Choses. 8vo. Paris 1877. The Author. Dawson (J. W.), F.R.S. Supplement to the second edition of Dove (H. W.) For Mem. R.S. Monatliche Mittel des Jahrganges Presents, March 21, 1878. Transactions. Bombay :-Royal Asiatic Society, Bombay Branch. Journal. London-Institution of Mechanical Engineers. Proceedings. 1877. The Association. The Institution. Madrid-Comision del Mapa Geológico de España. Boletin. Tomo The Academy. Transactions (continued). Stockholm :-Bureau Géologique de la Suède. Carte Géologique, livraison 57-62, et 1-3. 8vo. and 8 sheets. 1877.-Glaciala Bildningar, af O. Gumælius. 2. 8vo. 1876.-Kemiska Bergartsanalyser, af H. Santesson. 1. 8vo. 1877.-Om en Cycadékotte, af A. G. Nathorst. 8vo. 1875.-Arktiska Växtlemningar i Skane, af A. G. Nathorst. 8vo. 1877.-Nerikes Ofvergängsbildningar, af G. Linnarsson. 8vo. 1875.-Undersökningar öfver Istiden, af O. Torell. 1. 8vo. 1873.-Sur les traces les plus anciennes de l'existence de l'homme en Suède, par O. Torell. 8vo. 1876. The Bureau. Toulouse:-Académie des Sciences, Inscriptions et Belles Lettres. Mémoires. 7e Série. Tome VIII, IX. 8vo. 1876-77. Turin:-Accademia Reale delle Scienze. 1877-78. Anno 1. 8vo. Torino 1877. Yokohama :-Asiatic Society of Japan. Part 1, 2. 8vo. 1877. The Academy. Annuario per l'Anno Transactions. Vol. V. The Society. Duncan (P. M.), F.R.S. A Description of the Madreporaria dredged up during the Expedition of H.M.S." Porcupine," in 1869 and 1870. Part 2. 4to. London 1878. The Author. Gibson (G. A.) The Old Red Sandstone of Shetland, a Graduation Thesis. 8vo. Edinburgh 1877. The Author. Habirshaw (F.) Catalogue of the Diatomacea with references to the various published descriptions and figures. 4to. New York 1877. The Author. Hague (A.) and S. F. Emmons. 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Read January 24, 1878.* In a map of the solar spectrum, containing a greatly increased number of lines, such as that upon which I am now engaged, it is possible to seek under favourable conditions the coincidence or noncoincidence of lines due to elements hitherto undetected in the solar atmosphere, on account of their existing in quantities insufficient to give very marked spectral lines. A search has accordingly been made, on the principles laid down in previous communications, for those elements which contain in their spectra long and well-characterised lines in the photographic region. Although the evidence cannot be said to be complete until the whole spectrum has been examined, it is not too early to adduce the following evidence as to the existence of several additional metals in the sun's reversing layer, and the probable existence of others. The results obtained up to the present time are shown in the following tables, premising that in the first paper of this series the metals considered as being solar as the result of the labours of Kirchhoff, Ångström, and Thalèn, together with the considerations there brought forward regarding the length of the lines, were as follows:: |