Chromium
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In our eReader you can find the full English version of the book. Read Chromium 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 Chromium
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But the ore from which chromium is always obtained is chro- mite or u chrome ironstone. " Its composition may be expressed by the formula FeCr 2 O 4 ; but part of the chromium may be replaced by iron, or the iron may be partly replaced by magnesium, and the replacements are found in ore far removed from the surface of the ground. Alumi- num is also sometimes present, and silica is often found in the sand ore, or ore containing the chromite in the form of small grains. The purest ore is found in... lumps weighing sometimes several pounds.
572 MINERAL RESOURCES.
Production. The following table represents about the amount of ore mined in the last three years ; it is all from California : Production of chrome ore in California.
Years.
Tons of 2, 240 pounds.
Value in Cali- fornia.
1882...
2, 500 $50, 000 1883 3, 000 60, 000 1884 2 000 35 000 7, 500 145, 000 There is no regular spot value for chrome ore at the mines, as the cost varies irregularly in each district and much is mined by the manu- facturers' agent who owns the mine.
What to read after Chromium?
You can find similar books in the "Read Also" column, or choose other free books by David Talbot Day to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
But the ore from which chromium is always obtained is chro- mite or u chrome ironstone. " Its composition may be expressed by the formula FeCr 2 O 4 ; but part of the chromium may be replaced by iron, or the iron may be partly replaced by magnesium, and the replacements are found in ore far removed from the surface of the ground. Alumi- num is also sometimes present, and silica is often found in the sand ore, or ore containing the chromite in the form of small grains. The purest ore is found in... lumps weighing sometimes several pounds.
572 MINERAL RESOURCES.
Production. The following table represents about the amount of ore mined in the last three years ; it is all from California : Production of chrome ore in California.
Years.
Tons of 2, 240 pounds.
Value in Cali- fornia.
1882...
2, 500 $50, 000 1883 3, 000 60, 000 1884 2 000 35 000 7, 500 145, 000 There is no regular spot value for chrome ore at the mines, as the cost varies irregularly in each district and much is mined by the manu- facturers' agent who owns the mine.
What to read after Chromium?
You can find similar books in the "Read Also" column, or choose other free books by David Talbot Day to read onlineMoreLess
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