Manual of mineralogy: including observations on mines, rocks, reduction of ores, and the applications of the science to the arts ...

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Durrie & Peck, 1851 - 432 Seiten
 

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Seite 430 - Is traversed lengthwise by two parallel ranges of mountains — the Sierra Nevada on the east and the coast range on the west — which...
Seite 49 - ... be produced in the same direction ; then the sum of the exterior angles A, B, C, D, E, will be equal to four right angles. For each interior angle, together with its adjacent exterior angle, is equal to two right angles (Prop.
Seite 96 - ... is inflamed for the purpose of assisting in the preparation of food. It is collected by sinking pits several yards in depth, into which the naphtha flows. It is burned in lamps, by the Persians, instead of oil. Near the village of Amiano, in the state of Parma, there exists a spring which yields this substance in sufficient quantity to illuminate the city of Genoa, for which purpose it is employed.
Seite 310 - Extraction of Palladium in Brazil. The extraction of palladium, from the auriferous sand of Brazil, consists in fusing it with silver, and, consequently, forming a quaternary alloy of gold, palladium, silver, and copper, which is granulated by projecting it into water. By treating this alloy with nitric acid, the gold is separated from the other metals which are soluble in the acid; the silver is precipitated by a solution of common salt in the state of insoluble chloride, which being separated,...
Seite 81 - The rocks in which the diamond occurs in Brazil are either a ferruginous quartzose conglomerate, or a laminated granular quartz called Itacolumite. The latter rock occurs in the Urals, and diamonds have been found in it ; and it is also abundant in Georgia and North Carolina. In India the rock is a quartzose conglomerate.
Seite 275 - Dissolves in heated nitric acid, with a precipitation of the sulphur. Dif. The vitreous copper ore resembles vitreous silver ore ; but the luster of a surface of fracture is less brilliant, and they afford different results before the blowpipe. The solution made by putting a piece of the ore in nitric acid, covers an iron plate (or knife blade) with copper, while a similar solution of the silver ore covers a copper plate with silver. Obs. Occurs with other copper ores in beds and veins. At Cornwall,...
Seite 385 - Also, 4 inches are 1 hand; 6 feet 1 fathom; -40 rods 1 furlong ; 8 furlongs 1 mile ; 3 miles 1 league.
Seite 345 - such was the care of the ancients to provide strong and durable materials for their public edifices that but for the desolating hands of modern barbarians, in peace and in war, most of the temples and other public monuments of Greece and Rome would have remained perfect at the present day, uninjured by the elements during two thousand years.
Seite 85 - ... generally divides it into two varieties : — First, Coal without Bitumen. Second, Coal with Bitumen. The first variety is known by the general name of Anthracite. It has however various local names. [ANTHRACITE.] It is sometimes very hard, and has a high lustre, and is often iridescent. Besides being used for fuel it is often made into inkstands, small boxes, and other articles of use. This is more especially the case with the Anthracite of America. It is the most common form of coal in the...
Seite 296 - Isle of Wight,) in their little wicker boats covered with leather. The import of the passage in Diodorus, is that the Britons who lived in those parts dug tin out of a rocky sort of ground, and carried it in carts at low water to certain neighboring islands ; and that from thence the merchants first transported it to Gaul, and afterwards on horseback in thirty days to the springs of Eridanus, or the city of Narbona, as to a common mart. JEthicus too, another ancient writer, intimates the same thing,...

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