für jede auf dem Principe der orthogonalen (orthographischen) Projekzion beruhende perspektivische Projekzionsart oder ParallelPerspektive. Von Rud. Skuhersky, o. ö. Prof. am Polytechnischen Institute in Prag. 4to pamph. Prag. 1858. Očeském prvotnim prekladu sv. evangelii o obmenách jeho az do XV. stoletti. Sepsal Josef Jireček. 4to pamph. V. Praze. 1859. Die Porphyre im Silurgebirge von Mittelböhmen. Von Carl Feistmantel. 4to pamph. Prag. 1859. American Association for the Advancement of Science. Proceedings of the Thirteenth Meeting, held at Springfield, Massachusetts, August, 1859. 1 vol. 8vo. Cambridge. 1859. American Geographical and Statistical Society. The Polar Exploring Expedition. A Special Meeting of the American Geographical and Statistical Society, held March 22, 1860. 8vo pamph. New York. 1860. John Bartlett. A New Method of Chess Notation. 1 sheet. Folio. Cambridge. 1857. Samuel Nicolson. The Nicols Pavement, invented by Samuel Nicolson of Boston, Mass. Second Edition, with Additions. 8vo pamph. Boston. 1859. Joseph E. Worcester, LL. D. A Dictionary of the English Language. 4to. Boston. 1860. W. Ferrel, A. M. The Motions of Fluids and Solids relative to the Earth's Surface; comprising Applications to the Winds and the Currents of the Ocean. (Taken from the First and Second Vols. of the Math. Monthly.) 4to pamph. New York. 1860. Theodore Lyman. Académie Royale des Inscriptions et Belles Lettres. Histoire de l'Académie depuis son Etablissement jusqu'à present [continued to the 8th August, 1793]; avec les Mémoires de Littérature tirez des Registres de cette Académie depuis son Renouvellement jusqu'en 1710 [continued to 1793]. 50 Tomes. 4to. Paris. 1717 - 1808. Tableau General des Ouvrages contenus dans le Recueil des Mémoires de l'Académie. 1 vol. 4to. Paris. 1791. Institut National des Sciences et Arts. Mémoires, Sciences Morales et Politiques [1796-1803]. Tom. I.-V. 4to. Paris. An VI. – XII. [1798–1804]. — Littérature et Beaux-Arts. Tom. Classe Institut Royal de France. Histoire et Mémoires: d'Histoire et de Littérature Ancienne. Tom. I. - IV. 4to. Paris. 1815 - 18. The Jablowskian Society, Leipsic. Die Antike Landwirthschaft und das von Thunen'sche Gesetz. aus den alten Schriftstellern, Dargelegt von Dr. Heinrich Wiskemann. Gekronte Preisschrift. 4to pamph. Leipzig. 1859. Royal University of Christiana, Norway. Generalberetning fra Gaustad Sindssygeasyl; for Aaret 1858, ved Ole Sandberg Direktor. 4to pamph. Christiania. 1859. Tale (og Cantate) ved det Norske Universitets Mindefest for Kong Oscar den 22de Sept. 1859, af J. S. Welhaven, Prof. 8vo pamph. Christiania. 1859. Ueber die Geometrische Repräsentation der Gleichunden zwischen Zwei veränderlichen, reellen oder komplexen Grössen von C. A. Bjerknes. 4to pamph. Christiania. 1859. Om Ædrueligheds-Tilstanden i Morge ved Gilert Sundt. Cand. theol. 8vo pamph. Christiania. 1859. Beretning om en Zoölogisk Reise foretagen i Sommeren 1857. ved D. C. Danielssen. 8vo pamph. Christiania. 1859. Det Kongelige Norske Frederiks Universitets Aarsberetninger for Aarene 1856, 1857, og 1858. 8vo pamph. 1859. Christiania. Aarsberetning for 1857 fra Overlæge for den Spedalske Sygdom O. G. Hoegh til Departementet for det Indre. 8vo pamph. Christiania. 1858. for 1858 fra Overlægerne. O. G. Hoegh og C. J. Loberg. . . . . . 8vo pamph. Christiania. 1859. Forteguelse over Modeller af Landhusholdnings Redskaber fra Ladegaardsoens Hovedgaard ved Christiania. Beretninger om Sygdomsforholdene i 1842 og 1843 i Danmark, Sverige og Norge, oplæste ved de skandinaviske Naturforskeres Möde i Christiania, 1844. Anhang til Mödets Forhandlinger. 8vo pamph. Christiania. 1847. Karlamagnus Saga ok Kappa Hans. Fortællinger om Keiser Karl Magnus og Hans Jævninger. i Norsk Bearbeidelse fra det Trettende Aarhundrede. Udgivet af C. R. Unger. 1 vol. 8vo. Christiania. 1859. Personalier oplæste ved Hans Majestæt Kong. Oscar den I's Begravelse i Ridderholmskirken, den 8de August, 1859. 8vo pamph. Christiania. 1859. Al-Mufassal, Opus de Re Grammatica Arabicum, Auctore AbúlKâsim Mahmûd Bin 'Omar Zamahs'ario, ad Fidem Codicum Manu Scriptorum Edidit J. P. Broch. 8vo pamph. Christianiæ. 1859. Nathan Appleton. Letter to the Hon. William C. Rives, of Virginia, on Slavery and the Union. 8vo pamph. Boston. 1860. Richard Owen, M. D., V. P. R. S., etc. Address by Richard Owen. Superintendent of the Nat. Hist. Departments, British Museum. 8vo pamph. London. Association of Miners and Smelters. Bericht über die erste allgemeine Versammlung. zu Wien (10. bis 15. Mai 1858) Redigirt und Herausgegeben von Comité der Versammlung. 1 vol. 8vo. Wien. 1859. Four hundred and eighty-fifth meeting. August 8, 1860. STATED MEETING. The PRESIDENT in the chair. A quorum for the transaction of business not being present, only scientific communications were in order. The Corresponding Secretary communicated two papers, entitled as follows: "A List of the Phænogamous Species of a Botanical Collection made in the Eastern Part of Cuba by Charles Wright, in the years 1856, 1857, and 1859-60, with characters of the New Genera and Species: Part I. The Polypetalæ and Apetalæ, by Professor A. Grisebach, of the University of Göttingen." "Determinations of the Ferns of the same collection, also of Fendler's Venezuelan Collection, by Daniel C. Eaton, of New York." Dr. C. T. Jackson read and commented on a letter received by him from M. Moissent, of the Imperial School of Mines, Paris, giving an account of a new gas-engine, invented by M. Lenoir of that city. He also gave some further details concerning the frozen well, at Brandon, Vermont. Four hundred and eighty-sixth meeting. September 11, 1860.- MONTHLY MEETING. The PRESIDENT in the chair. Professor Horsford, chairman of the Rumford Committee, laid upon the table the dies for the Rumford medal, received from the United States Mint, in pursuance of a vote of the Academy at the last Anniversary Meeting. And they were deposited in the iron safe of the Academy. Professor Horsford submitted a memoir on the relations of the salts of zinc and alumina to those of soda and potassa. Messrs. Charles W. Eliot and Frank H. Storer presented the two following notes, supplementary to their Memoir upon the Impurities of Commercial Zinc. I. On the Amounts of Lead contained in some Silver Coins. From our experiments upon the impurities of commercial zinc,* we found that this metal almost invariably contains lead. In the preparation of silver at the United States Mint, zinc is used for the purpose of reducing chloride of silver,† and a sample of zinc similar to that used at the Mint, which we examined, yielded half of one per cent of lead. The question naturally suggested itself whether lead might not thus find its way into American silver coin, and to determine this point we have analyzed several American coins, as specified in the following table; for the sake of comparison we subsequently examined the other coins therein enumerated. * Memoirs of the American Academy, 1860 [N. s], VIII. 57. † Booth and Morfit's Smithsonian Report on Recent Improvements in the Chemical Arts, (Washington, 1851,) p. 56. Compare Wilson's Report on the New York Industrial Exhibition, in Dingler's Polyt. Journal, 1855, CXXXV. 119. five-franc piece of 1852. Napoleon III. 24.9725 0.1135 0.1069 0.4282 0.1296 0.0886 0.3546 * Columns (a), (b), and (c) contain the results of a supplementary series of experiments, made merely to control the results given in columns (4) and (5). (Vid. infra.) †The solution of this fine silver in nitric acid became blue when neutralized with ammonia. The filtrate from the mixed precipitate of sulphate of lead and gold (see p. 56) contained a decided trace of copper and a fainter trace of iron. The solution of sulphate of soda, from which the sulphuric acid of col. (3) was |