29 Very strong, solution complete. Violent, forming an in-Violent, solution com soluble sulphate. plete. In Transylvania, at Offenbanger, Fatzbay, in the mines of Maria Lo zetto. In France, near Limoges, at Allemont, Hungary, near Boinik, Spain, at Cajuelo; America; England, in Cornwall, &c. In France, in the department of Isere and Haute Vienne; Bohemia, at Zinnwald; Saxony, at Ehrenfreidersdorf; Sweden, at Bilverg, &c. In France, at Simphorien, near Autun, environs of Limoges; Bohemia, at Goachinsthat; Saxony, at Schverberg; England, in Cornwall. In France, at Vizille, (Ysere,) Bagoo ry, (haute Pyrenees;) Sweden, at Dammera; England, counties of Somerset and Nottingham; Swabia, Poland, Hungary, &c. Names of the substances with State in which which the ore is united in the they are found mines. Iron and gold, gold and silver, Mineralized. gold, silver, and sulphur, lead, sulphur, and copper. Oxygen. Mineralized. Oxygen and lime, oxygen and Mineralized. iron, forming the "tungstates." Oxygen in the state of protox-Mineralized. ide and peroxide. Oxygen, cadmium, sulphur, Mineralized. carbonic and sulphuric acids. Principal processes of reduction. By the humid process. By mixing the oxide with soot and oil, and melting in a strong fire. By treating the acid of Tung sten as the oxide of Cobalt. By mixing its oxide with soot and oil, and melting in a strong fire. By treating the Calamium in closed vessels, with charcoal, the zinc sublimes, and is afterwards melted. * There are six others metals, whose existence was first admitted by analogy, or because the matters from which they are extracted have the greatest resemblance to me. tallic oxides, viz: Magnesium, Glucinium, Lithium, Aluminium, Thorium, and Zirconium. The existence of these metals has been proved, and others discovered, since this table was prepared. Whenever two specific gravities are expressed, the first is that of the metal hammered or condensed, by rolling. Several other metals have been discovered since the date of this table, and several of the compartments marked undetermined, will be found in the last edition of Thenard. 36* Physical Science. Second Report of the Joint Committee on Meteorology, of the American Philosophical Society and Franklin Institute. In commencing this report we have still to regret that the extent of our correspondence north-west and south-east is not great enough to enable us to ascertain the boundaries of our great storms in those directions; and of course we cannot determine the direction of the winds in those boundaries -a knowledge which we believe to be of the highest importance to the science of meteorology. The committee do not yet despair, however, of extending this correspondence so far as to attain so desirable an end, and with the hope of aiding this extension, proceed to give an account of a few of the most remarkable storms which have occured since their first report. These we are sure will be found to be highly interesting, even with the imperfect knowledge which our limited correspondence enables us to give of them. It will be seen that the character of some of them varies from our great north-east storms which come from the south-west. They seem to have travelled southwardly or south-eastwardly, as will be seen by the storms of the 14th and 15th of May, of the 20th of May and 19th of June. It is much to be hoped that gentlemen throughout the country, who may see this report, will communicate to us any fact connected with the storms here detailed, which may either be favourable or adverse to the generalization upon which we have ventured, It would be particularly desirable to know the boundaries of the great rain which took place on the 19th of June, to the north-east. For this purpose, if gentlemen living in Vermont and New Hampshire, and the north of New York, would consult their meteorological journals, and let us know whether it rained there at that time or not, and which way the wind blew, they would confer a great favour on the committee. From the nature of the remarks below, it will be understood what kind of information is wanted. We hope every gentlemen to whom this is sent will be induced to furnish a faithful correspondent, who will at least carefully observe all storms, their beginning and ending, and the course and changes of the wind, during their progress. The labour, though great, of collating numerous journals, and deducing from them general conclusions, will be cheerfully continued by the committee. These journals are carefully preserved in the archives of the Franklin Institute, and will be accessible to any meteorologist who may wish to consult them. We now proceed to detail the phenomena attending the most remarkable rains and storms which took place between the date of our first report and the eleventh of November, 1835; and to enable the reader to comprehend the report with greater ease, we recommend him to bear in mind this remarkable generalization-In all the seven storms examined, the wind blew towards the point where it was raining. To this rule there is not one exception; for though the very first storm mentioned, that of the 26th of April, terminated at Philadelphia, and passed on to the north-east, with the wind still from the north-east, it appears plainly that a much greater storm was raging at that very time at no great distance to the south-west, in the very direction towards which the wind was blowing. The storm of the 20th of May was evidently too local in its character to form an exception. As it is known, however, that many of our summer |