Annual Report of the United States Geological Survey to the Secretary of the Interior

U.S. Government Printing Office, 1898

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Seite 55 - Jan. Feb. Mar. Apr. May. Jane. July. Aug. Sept. Oct. Nov. Dec.
Seite 599 - That imported salt in bond may be used in curing fish taken by vessels licensed to engage in the fisheries, and in curing fish on the shores of the navigable waters of the United States, under such regulations as the Secretary of the Treasury shall prescribe; and upon proof that the salt has been used for either of the purposes stated in this proviso, the duties on the same shall be remitted...
Seite 689 - Though a considerable amount of coal has been extracted here, the industry has not .been a profitable one hitherto. This is, at least in part, due to crude methods of transportation. It is said, however, that the seams are often badly faulted. At Uling, about 10 miles west of the capital, the seams reach a maximum thickness of 15£ feet.
Seite 11 - The figures of exports are from the Statistical Abstract of the United States, published by the Bureau of Statistics, Treasury Department.
Seite 691 - Leyte, there are gold quartz veins, one of which has been worked to some extent. It is 6 feet in thickness, and has yielded from $6 to $7 per ton. In the island of Mindanao there are two known gold-bearing districts. One of these is in the province of Surigao, where Placer and other townships show gravels and veins.
Seite 688 - The distribution of each mineral or metal may now be sketched in somewhat greater detail. In many cases the information given in this abstract is exhaustive, so far as the available material is concerned. The coal fields of Cebu, however, have been studied in some detail by Mr. Abella, and in a few other instances more extended information has been condensed for the present purpose.
Seite 689 - This fuel is said to be similar to that of Batan. The islands of Masbate and Panay contain coal, the deposits of which thus far discovered do not seem of much importance. Specimens from the southwestern portion of Leyte, analyzed in the laboratory of the Inspeccion de Minas, are of remarkably high quality, but nothing definite about the deposit is known to me.
Seite 691 - It consists in alternate partial roasting and reduction to "matte" and eventually to black copper. It is generally believed that this process must have been introduced from China or Japan. It is practiced only by one peculiar tribe of natives, the Igorrotes, who are remarkable in many ways. Vague reports and the routes by which copper smelted by natives comes to market indicate that there are copper mines in various portions of the Cordillera Central, but the only deposits which have been examined...
Seite 393 - The above conditions will be affected by a reducing atmosphere in burning, or the presence of sulphur in the fire gases. 4. The quantity of water. Clays with a large amount of chemically combined water sometimes exhibit a tendency to crack in burning, and may also show high shrinkage.
Seite 393 - High-grade clays show a percentage of silica, alumina, and water, approaching quite closely to those of kaolinite. 2. The refractoriness of the clay, for, other things being equal, the greater the total sum of fluxing impurities, the more fusible the clay. 3. The color to which the clay burns. This may be judged approximately, for clays with several per cent or more of ferric oxide will burn red, provided the iron is evenly and finely distributed in the clay, and there is no excess of lime.

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