The Published Writings of George Newbold Lawrence, 1844-1891, Ausgaben 40-42
U.S. Government Printing Office, 1892 - 124 Seiten
The beneficial influence of the labors of Mr. Lawrence on the progress of American ornithology has been great and undisputed, but it was particularly among the avifauna of the West Indies, Mexico, Central and South America that his most strenuous efforts were exerted. A scrutiny of the titles of his numerous papers will fully indicate the wide scope and excellent character of the work of this veteran ornithologist.
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Seite iv - Museum, the publication of which was commenced in 1875, consist of elaborate papers based upon the collections of the Museum, reports of expeditions, etc., while the Proceedings facilitate the prompt publication of freshly-acquired facts relating to biology, anthropology, and geology, descriptions...
Seite 122 - No. 41) is one of a series of papers intended to illustrate the collections belonging to the United States, and constituting the. National Museum, of which the Smithsonian Institution was placed in charge by the act of Congress of August 10, 1846. The publications of the National Museum consist of two series — the Bulletins, of which this is No.
Seite 235 - Obs. Asphaltum is met with .abundantly on the shores of the Dead Sea, and in the neighborhood of the Caspian. A remarkable locality occurs on the island of Trinidad, where there is a lake of it about a mile and half in circumference. The bitumen is solid and cold near the shores; but gradually increases in temperature and softness toward the centre, where it is boiling. The appearance of the solidified bitumen is as if the whole surface had boiled up in large bubbles and then suddenly cooled.
Seite 122 - Full lists of the publications of the Museum may be found in the current catalogues of the publications of the Smithsonian Institution. Papers intended for publication in the Proceedings and Bulletin of the National Museum are referred to the Committee on Publications, composed as follows: TH Bean (chairman), A. Howard Clark,
Seite 189 - Rough crystals. Irish Creek, Rockbridge County, Virginia. (30866.) TIN ORES. It has been generally supposed that tin was a rare metal in this country. This, however, is only partially true, the occurrence of cassiterite, the binoxide of tin, in small quantities, being known to mineralogists from a large extent of territory for many years^ but it is only in...
Seite 80 - Besides these large masses these mines also carry considerable disseminated free copper. Second, the amygdaloid mines, which are characterized by the occurrence of the free copper in amygdules, bunches, strings, and sheets from the size of a pin-point up to a few...
Seite 21 - Catalogue of a collection of Birds in the Museum of the Smithsonian Institution, made by Mr. HE Holland, at Greytown, Nicaragua, with description of new species.
Seite 190 - Alabama; the Cash Mines, in Rockbridge County, Virginia, and the deposits at Harney Peak, in the Black Hills of Dakota. In 1884 a further discovery was made at King's Mountain, North Carolina. The collection of tin ores, besides including a few specimens of purely mineralogical significance, contains samples of every locality that has ever given any promise of producing the ore in any amount. (1) Caesiterite, fluorite, margante, calcite, shows full width of the vein.
Seite 2 - ... loss of a small portion of the valuable constituents, and the waste material is rejected, and in some cases, ores of different metals occurring together are separated from each other. Illustrations of these processes form the next step in the series, and consist of the ores as mined, and the products of each step in the dressing operations, including both the valuable and the waste products. The final step of the series represents the processes of extracting the metals from their ores and converting...