 | James Dwight Dana - 1850 - 800 Seiten
...chlorid of platinum and ammonium) is then heated and thus reduced to the metallic stete ; the platinum is now in an extremely minute state of division. This...next compressed in steel moulds by the aid of heat ana strong pressure ; and when sufficiently compact, is forged under the hammer and then reduced at... | |
 | United States. Patent Office - 1852 - 854 Seiten
...state, the platinum being then in an extreme minute state of division. This black powder, which is spongy platinum, is next compressed in steel moulds...pressure, and when sufficiently compact, is forged under a hammer, by which it is ultimately reduced to a solid mass. Among the illustrations of this metal... | |
 | United States. Patent Office - 1852 - 534 Seiten
...state, the platinum being then in an extreme minute state of division. This black powder, which is spongy platinum, is next compressed in steel moulds...pressure, and when sufficiently compact, is forged under a hammer, by which it is ultimately reduced to a solid mass. Among the illustrations of this metal... | |
 | United States. Congress. Senate - 1852 - 576 Seiten
...state, the platinum being then in an extreme minute state of division. This black powder, which is spongy platinum, is next compressed in steel moulds...pressure, and when sufficiently compact, is forged under a hammer, by which it is ultimately reduced to a solid mass. Malachite occurs in large quantities in... | |
 | James Dwight Dana - 1854 - 946 Seiten
...Tlie metal platinum was first discovered by Ulloa, a Spanish traveler in America, in the year 1735. This metal fuses readily before the " compound blowpipe;"...twenty-eight ounces into one mass. The metal was almost a? malleable and as good for working as that obtained by the other process ; it had a specific gravity... | |
 | Industry - 1855 - 424 Seiten
...state ; the platinum is then in an extremely minute state of division. This black powder, which is spongy platinum, is next compressed in steel moulds...pressure, -and, when sufficiently compact, is forged under a hammer, by which it is ultimately reduced to a solid mass. With the mention of this metal we shall... | |
 | James Dwight Dana - 1863 - 482 Seiten
...chlorid of platinum and ammonium) is then heated and thus reduced to the metallic state ; the platinum is now in an extremely minute state of division. This...blowpipe ;' and Dr. Hare succeeded in 1837 in melting twenty-eiglrf ounces into one mass.* The metal was almost as malle. able and as good for working as... | |
 | James Dwight Dana - 1879 - 496 Seiten
...extreme tenuity. Platinum was formally coined m Russia. The coins had the value of 11 and 22 rubles each. This metal fuses readily before the "compound blowpipe...twentyeight ounces into one mass. The metal was almost as malle jibli- and as good for working as that obtained by the other it had :i >]>ivitic gravity of 19-8.... | |
 | United States. Congress. House - 548 Seiten
...state, the platinum being then in an extreme minute state of division. This black powder, which is spongy platinum, is next compressed in steel moulds...pressure, and when sufficiently compact, is forged under a hammer, by which it is ultimately » reduced to a solid mass. Among the illustrations of this melal... | |
 | James Dwight Dana - 1887 - 562 Seiten
...tenuity. Platinum was formerly coined in Russia. The coins had the value of 11 and 22 rubles each. This metal fuses readily before the " compound blowpipe ;" and Dr. Hare succeeded in 1837 in melting tventyeight ounces into one mass. The metal was almost as malleable and as good for working as that... | |
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This metal fuses readily before the "compound blowpipe :" and Dr. Hare succeeded in 1837 in melting twenty-eight ounces into one mass.* The metal was almost as malleable and as good for working as that obtained by the other process ; it had a specific... 