Underground Treasures How And Where to Find Them a Key for the Ready Determina
Underground Treasures How And Where to Find Them a Key for the Ready Determina
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In our eReader you can find the full English version of the book. Read Underground Treasures How And Where to Find Them a Key for the Ready Determina Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Underground Treasures How And Where to Find Them a Key for the Ready Determina
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. IVrr Platinum, . . -nroTnr Gold, . . • Too oTTo" That is, an ore of iron which contains less than 25 per cent, of metal will not pay for working ; for the reduction of iron in comparison with copper ore is very dif- ficult. Gold is very easily extracted, and hence some quartz rocks which do not ap- parently contain a particle of gold, pay jfcr 94 UNDERGROUND TREASURES.
well, a bushel of rock often yielding half an ounce.
Iron occurs in large masses or beds ; but the other metals are scattered... in fragments through sand or soil, or exist in veins running through rocks.
Washing for Gold and Platinum. — This operation, called "panning, " is the oldest and simplest method of extracting the precious metals. At the present time, it furnishes to Russia nearly all the gold produced in that empire. It is based on the principle that substances of different weights may be separated by means of water, — the heaviest going to the bottom first. To examine the bank or bed of a river, suspected to contain gold, fill a milk- pan with the sands and carry it to a tub or pool of quiet water.
What to read after Underground Treasures How And Where to Find Them a Key for the Ready Determina?
You can find similar books in the "Read Also" column, or choose other free books by Orton James to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
. IVrr Platinum, . . -nroTnr Gold, . . • Too oTTo" That is, an ore of iron which contains less than 25 per cent, of metal will not pay for working ; for the reduction of iron in comparison with copper ore is very dif- ficult. Gold is very easily extracted, and hence some quartz rocks which do not ap- parently contain a particle of gold, pay jfcr 94 UNDERGROUND TREASURES.
well, a bushel of rock often yielding half an ounce.
Iron occurs in large masses or beds ; but the other metals are scattered... in fragments through sand or soil, or exist in veins running through rocks.
Washing for Gold and Platinum. — This operation, called "panning, " is the oldest and simplest method of extracting the precious metals. At the present time, it furnishes to Russia nearly all the gold produced in that empire. It is based on the principle that substances of different weights may be separated by means of water, — the heaviest going to the bottom first. To examine the bank or bed of a river, suspected to contain gold, fill a milk- pan with the sands and carry it to a tub or pool of quiet water.
What to read after Underground Treasures How And Where to Find Them a Key for the Ready Determina?
You can find similar books in the "Read Also" column, or choose other free books by Orton James to read onlineMoreLess
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