List of Dried Plants Brought Home by the U.S.N. Astronomical Expedition (Google eBook)

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Page 92 - It is of various shades of green and blue, sometimes of a dark and almost black color. Its specific gravity is 2.2 ; it is easily crushed. It is not an easy matter to find the chrysocolla perfectly pure. The specimen that furnished the material analyzed was a mass of copper pyrites, covered with a mamillary coating of the silicate, which was detached with much care. It furnished Oxide of copper ------ 42.51 Silica - 31.35 Water - - 21.62 Oxide of iron ------ 1.97 Alumina 2.83 100.28 Corresponding...
Page 135 - An extract from Von Tschudi will add to the interest of these relics: " Under the dynasty of the Incas, when any useful plant and animal was an object of veneration, the Peruvians rendered almost divine worship to the llama and his relatives, which exclusively furnished them with wool for clothing, and with flesh for food. The temples were adorned with large figures of these animals, made of gold and silver, and their forms were represented in domestic utensils of stone and clay.
Page 236 - ... extending its point beyond the edge of that bone, mayhap a little more acute and more conspicuous in P. melanops than in P. chilensis. The suprascapular is likewise crenated, and the coracoid expansion above the base of pectoral fins, wanting, however, the minute spines observed in P. chilensis. The branchiostegals, six in number, are flattened and curved. The gill openings communicate together under the throat, being shaped exactly as in P. chilensis. The distance between the tip of the snout...
Page 137 - K', showing channels of communication between the partitions at the bottom and along the sides. These do not exceed one fourth of an inch bore. They have been cut too large in the engraving. From a slight examination it will be perceived that the contents of cells 1, 6, 8, 3, were discharged at one orifice, while those of 2, 5, 4, 7, ran out at the other. The material of this vessel is of a uniform grayish-black color, and not very hard almost as easily cut as soapstone. The corner and two side...
Page 86 - And it is worthy of remark, that no mines are found higher than 4,500 feet above the level of the sea; and this peculiarity, I believe, pertains to all parts of Chile. Taking the Bay of Copiapo as a starting point, and going east, we find the underlying rock of the country granite, the surface being covered with tertiary deposits of very modern origin, the same that is found at the mouth of all the Chilean rivers. These deposits form two and three terraces, and consist principally of sand, mixed...
Page 91 - Atacama, particularly in those of San Antonio. It is almost always mixed with copper pyrites in varying proportions, and sometimes with the oxide and amorphous green arseniate of copper. Besides this species, there is found in the cordilleras a kind of white native copper, containing from 3 to 5 per cent. of arseniuret of copper and resembling native silver. . Olivenite, Arseniate of Copper. It always accompanies the arseniurets and is amorphous, with a compact earthy structure, green color,...
Page 89 - ... silver. Erubescite or Purple Copper. This is one of the most abundant of the minerals of copper found in Chile. It is procured in large quantities at the mines of Tamaya in Coquimbo, Los Sapos, and Higuera. No crystals were seen. It is massive, of a purplish, variegated color, with a metallic lustre. It is brittle, and not very hard. When the surface is freshly broken, it is of a brass color, that very often tarnishes, acquiring a purplish hue. The massive varieties of this mineral always...
Page 104 - Specimens examined by M. Domeyko contained a notable amount of iron ; one of his analyses is as follows Zinc -------- 43.0 Iron - - 12.4 Sulphur ------- 28.6 Gangue ------- 14.7 97.7 Its formula is Zn S, with iron, sometimes replacing a portion of the zinc.
Page 98 - ... zinc and manganese, and the sulphate of baryta, which, however, exists in less quantity in these mines than in those in other parts of Chile. The metalliferous portions of these veins are composed principally of chloro-bromide of silver, mixed with native silver, and a small portion of sulphuret and sulpho-arseniuret of silver. The chloro-bromide does not show itself in equal abundance at all depths of the productive calcareous bed, already mentioned : it is, particularly in the upper, one or...
Page 140 - S'. A pair of spring pincers or tweezers, one inch and a quarter long. The metal is thickest at the bend. They are little better than a piece of sheet copper, bent like them. U. A rough ingot of bronze, sixteen inches long, nearly two inches wide at the middle, and five-eighths of an inch thick. It...

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