Gems, jewelers' materials, and ornamental stones of California, Issue 37

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State Printer, 1905 - Nature - 171 pages
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Page 159 - ... mining and metallurgical processes ; to preserve and so maintain such collections and library as to make them available for reference and examination, and open to public inspection at reasonable hours ; to maintain, in effect, a bureau of information concerning the mineral industries of this state, to consist of such collections and library, and to arrange, classify, catalogue, and index the data therein contained, in a manner to make the information available to those desiring it...
Page 159 - ... make a collection of typical geological and mineralogical specimens, especially those of economic and commercial importance, such collection constituting the museum of the...
Page 159 - Mining Bureau ; to make a collection of models, drawings, and descriptions of the mechanical appliances used in mining and metallurgical processes; to preserve and so maintain such collections and library as to make them available for reference and examination, and open to public inspection at reasonable ID 8 * o HZ ES -- s O o 2 x.
Page 164 - Bureau began in 1893. No other State in the Union attempts so elaborate a record, expends so much labor and money on its compilation, or secures so accurate a one. The State Mining Bureau keeps a careful, up-to-date, and reliable but confidential register of every producing mine, mine-owner, and mineral industry in the State. From them are secured, under pledge of secrecy, reports of output, etc., and all other available sources of information are used in checking, verifying, and supplementing the...
Page 164 - ... the important duties of the department is to make such additions and corrections as will keep the maps up to date. The seeker after information inquires here if he wishes to know about the geology or topography of any district; about the locations of the new camps, or positions of old or abandoned ones; about railroads, stage roads, and trails; or about the working drawings of anything connected with mining. MINERAL STATISTICS.
Page 160 - ... technology of the mineral industries of this State. THE BULLETINS. The field covered by the books issued under this title is shown in the list of publications. Each bulletin deals with only one phase of mining. Many of them are elaborately illustrated with engravings and maps. A nominal price only is asked, in order that those who need them most may obtain a copy. THE REGISTERS OF MINES. The Registers of Mines form practically both a State and a County directory of the mines of California, each...
Page 77 - ... wood buried in soil soaked with some petrifying material becomes highly charged with the same and the cells filled with...
Page 109 - Rogers (I). the mine pits are carefully wrought and polished from hard basalt or trap, chiefly hammers and adzes or axes, generally grooved for a handle and often of large size. Some are beautifully perfect, others much worn and battered by use. "The most impressive feature, however, is the abundance of rock carvings in the whole region. These are very varied, conspicuous, and peculiar, while elsewhere they are very rare. Some are recognizable as .Aztec water signs...
Page 160 - The educational value of the exhibit is constantly increased by substituting the best specimens obtainable for those of less value. These mineral collections are not only interesting, beautiful, and in every way attractive to the sightseers of all classes, but are also educational. They show to manufacturers, miners, capitalists, and others the character and quality of the economic minerals of the State, and where they are found. Plans have been formulated to extend the usefulness of the exhibit...
Page 10 - It is a singular fact that these gems are better represented in the American Museum of Natural History in New York, the United States National Museum...

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