Enter a name, company, place or keywords to search across this item. Then click "Search" (or hit Enter).
Collection: Directories and Documents > Historical Clippings
Historical Clippings Book - Quartz Mining (HC-09) (375 pages)
Go to the Archive Home
Go to Thumbnail View of this Item
Go to Single Page View of this Item
Download the Page Image
Copy the Page Text to the Clipboard
Don't highlight the search terms on the Image
Show the Page Image
Show the Image Page Text
Reset View and Center Image
Zoom Out
Zoom In
Rotate Left
Rotate Right
Toggle Full Page View
Flip Image Horizontally
More Information About this Image
Get a Citation for Page or Image - Copy to the Clipboard
Go to the Previous Page (or Left Arrow key)
Go to the Next Page (or Right Arrow key)
Page: of 375
awh
The condition of most of the
Gold in Californian Sulphurets
Is much the same as that met with in the St.
John del Rey mines, and if treated in the same
way will amalgamate as easily. It only wants
to be reduced a little finer. It will be time
enough to adopt any of the new processes for
the treatment of rebellious gold ores when they
discover any other ore of gold, except telluric
gold, which, so far, has only been met with in
small quantities. Ina pamphlet published by
Mr. Kitto on the Gold Fields of Victoria as far
back as 1867, Mr. Kitto states that the average
Cost of Mining and Milling
Of the gold quartz in the Victoria district was
under 13%, say, $3 per ton. Some of the mines
were deeper than those in the Bodie district,
and the veinstone much harder to stamp, and
the gold, unlike that of Bodie, which is mostly
free, was mechanically mixed with the pvritic
matter, and consequently much more difficult
The Port Philip Cos. had, up to 1866,
stamped 388,681 tons of veinstone, which
yielded gold equal to six tons of 2,000 Ibe, each.
For four weeks’ returns, October of that year,
to gave.
the quantity of quartz stamped, 4,342 tons,
yielding 1,355 oz. 10 dwt. of gold, an average
of 6 dwt. 54 grains per ton—a little more than
$6. The receipts were £5,944 4s. 6d.; payments, £4,300 13s. 7d.; profit, £1,643 10s. 5d.
The introduction of the Comstock pan system may have caused the shutting down of the
Mammoth and many of the Bodie mines which
produce low-graile ore. The wet-stamping of
rich silver ores is a great mistake, and even in
the wet-stamping of low-grade silver ores, unless they contain a large proportion of chlorides,
they should be concentrated before amalgamation.
Concentrations on a small scale can be made
much closer with the batea than any other instrument, and consequently it is very useful in
checking the working of large machines,
A great deal of useful information may bo obtained from ‘‘Baron Inigo Born’s” book on
‘“‘Amalgamation,” published in 1791, wherein he
describes and illustrates with drawings, the process of ‘‘Movable Casks for Cold Amalgamation.
Careless Working.
A copper miner who understands anything of
his business, would be horrified if you were to
propose to him to work his mine after the fashion of some of our silver mines; that is, neglect
to make a careful assorting of the richer ore
when broken underground, and at the grass to
mix rich ore with comparatively waste rock,
and then pass them together through the ©
stamps, taking the chances afterward of whatsoever they may be, to recover the ore by pans,
etc. He would tell you how much would be
lost and carried away in suspension with the
water, and what a large proportion would go to
enrich the slime pits.
In the treatment of low-grade silver ores the
concentration of theore after stamping by such
a machine as the ‘‘Frue concentrator,” would,
I think, reduce the cost of milling and at the
game time save more silver, I take this opportunity to express the pleasure it gave me on visiting
The State Mining Bureau
To see how well and with what great taste the
collection we presented to that institution was
arranged, and also the satisfaction I felt that
the joint labor of so few should have been so
soon crowned with success, We not forget, however, that through the liberality of Mr.
ohn Mackay we were enabled to send the collection to the Paris exhibition of 1878, where it
won for this State a gold medal—proving -its
great value,
In the Mining Bureau it may be said to have
formed the nucleus of a collection for industrial purposes which has already grown so rapidly that it is superior to any on this coast, filling
& gap somuch needed; indeed at the rate in
which donations of minerals, etc,, are pouring
in, that institution will soon become a place of
great resort, and the publio will then feel grateul and award to Mr. Joseph Wasson the praise
he so justly deserves for tho forethought and
trouble he has taken to procure for them an institution of such a useful character,.