Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880: A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures — John Shaqi
Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880: A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and ManufacturesVarious
Science
Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880: A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures
Various
Science -- Periodicals; Technology -- Periodicals
It might not be uninteresting in this connection to give something
regarding the sampling and milling of ores. One of the most complete
concerns engaged in this business anywhere in the country is that of
Augustus R. Meyer & Co. This establishment has grown with the growth
and development of this carbonate district. The business was first
established as long ago as the year 1877 (before Little Pittsburg was
dreamed of). A little log house, a relic of seventeen years previous,
was found sufficiently ample for the needs of the business of that
period. However, it was not long before additions had to be made
and new buildings erected. In the year 1879 the present company was
incorporated with a capital stock of $50,000, and every preparation
that money and business sagacity could effect was made to meet the
demands of the prosperous era, that has built a mining metropolis
10,240 feet above the sea level, at the base of the great continental
divide. As at present constituted the premises of the company comprise
seven and one-half acres of ground, upon which six buildings have been
erected, including ore houses and crushing and sampling buildings.
During the busy season of summer from thirty-five to forty men are
employed, who alternate their work in two shifts, day and night. At
this season it frequently happens that the ore houses, which hold
1,500 tons, are insufficient for the accommodation of the mineral sent
from the mines to be crushed, and large quantities have to be stored
outside. In sampling ores from the various mines about Leadville this
establishment pursues the most careful methods. The different ores are
first deposited in large bins holding from 25 to 100 tons. One-tenth
of each load is taken and run through a Dodge crusher, which well
adapts it for the furnaces. A fifth of the tenth already indicated is
put through heavy rollers, and one half of this finely crushed ore is
subjected to the Bucking hammer and powdered to an eighty-sieve grade.
One sample of this powder, consisting of a fourth, is given to the
miner, two samples are kept for reference, and the other is sent to
the assayer, who takes his "assay ton," upon which the company buys
and sells. The capacity of the works are all the way from 80 to 150
tons per day. For samples, $7.50 is charged for silver and lead per
ton, and $10 per ton for gold; but in large quantities a less charge
is made. In job crushing, the market value of silver is allowed, with
from five to ten per cent. deducted. The Meyer works enjoy an excellent
patronage from the best mines of the camp, including such as the
Chrysolite, Carbonate, Vulture, Duncan, Matchless, Climax, Morning
Star, Crescent, and J. D. Dana, some of which have all their crushing
done at these sampling works.
[Illustration: AUGUSTUS R. MEYER AND COMPANY'S ORE MILL.]
* * * * *
RAILROADS.
Public-domain text, read in full here on John Shaqi.
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