The Placer herald., 1858-01-02
NUMBER II.
Mining Intelligence.

HowLAND's PATENT ROTARY BATTERY. - This
Battery has circular bed plate of about four
feet diameter having cone in the center some
four feet high; all making casting of over two
tons and half in weight The bed plate is pla-
ccd upon log set upright and inserted several
feet in the ground, as foundation Rising from
the bottom fange to top of the machine, are six
columns round the circle. Three feet above the
bed plate is the hopper for feeding the mill, the
rock being thrown in on all sides and between the
stamps. About two feet above the feed plate, is
the first row of boxes for stem of stamps. Above
this tier again. is another set giving the stems a
full and substantial support The distance from
the bottom of the bed plate to the top row of
boxes is seven feet, confning all the machinery
within q circle of four feet diameter. Between
the lst and 2nd row of boxes is the circular cam
shaft, with three wedgeike cams, each carrying
four stamps in regular order. The stamps weigh
500 pounds, coming down dies set in circle
on the bed plate. The distance between the cone
and outside of the battery is but little more than
the width of the stamps, causing all the rock en-
tering the mill to Immediately drop under the
stamps. The bed plate from bottom to point of
discharge, is about one foot in depth, making it
impossible for much gold to be discharged and as
the bed is one solid piece, neither gold or quick
silver can find any avenues of escape. The pulp
is discharged through selves of l20 to square inch
in fincness and all around the circle giving con-
siderable more discharge surface than can be had
in any mill now in The material is then re-
ceived by circular trough and from thence led
to amalgamating room. 1t is capable of making
! 1900 strokes minute but is now geared for 500.
Mr. Rowland is quite sangune of this IL stamp
battery being able to crush 25 per cent more than
any y stamp one of the old style. 1t is certainly
better arranged for saving gold, and should it do
an equal amount of work, will supercede all 9TH
crs in use.
The cost in San Francisco is So 45O, making
freight and all about $4,000.
.Ntpada Democrat
ANGEL s.-Thc Amador Sentinel, of Dec. 25th
says:
A little over one year ago Winters a. Co., Of
Angels Camp struck a vein Of paying matter
while sluicng, which consisted of black slate tai
cose, mica slate, and me traces of quartz rock
which yielded more or less gold. On inspection
this vein was found to be several feet in width
Winters X Brother commenced running a cut
through the mass, or strata, in order to obtain an
opening or access to dirt on the opposite side
! While prosecuting this work. they found that thi !,
newly discovered gold bearing strata of rock was
rich with gold, though very fine. The more they
prospcctcd the more valuable they found it, and
resolved to abandon the succ washing, and turn
their attention wholly to testing the richness of
their newly discovered rock. They erected tenn
porary machinery, consisting OF the arastra, ETC..
after which they erected mill, consisting of
twelve wooden stamps, carried by water power
The company prosecuted iheir work. and found
as they descended on the lode, or paying matter.
that it increased in richness Winters is now
working his mine. about so feet below the surface,
and finds it to increase in value as he sinks The
paying strata is about eight feet, an aver
age. in width, and it is said by those who think
they know, that the material pays from $40 to
$50 per ton There is no gold to be seen with the
naked eye; or, in other words, there is no 'frce
gold' 1t seems to he confined and held by the
sulphurets of iron, which is equal to about one
thirteenth in weight of the whole mass. For
about forty feet from the surface there is but lit
tie iron to be seen, except in the oxidzed strata
giving the appearance, to the mass, of brown and
red h@metites. The pyrites, or sulphurets of iron
are said to be worth from $40O to $1,000 per ton,
and they are being saved for further working.
The whole mass is soft and easily worked, and
much OF it has the appearance of soapstone. This
lode or strata runs parallel with the road for
nearly one mile, and through portion of the
town of Angels. The discovery of Winters led
to further investigation and developments, which,
have attracted the attention of the capitalists Of
San Francisco and elsewhere and the erection of
other mills and machinery have brought about a
change in the short space of one year that seems
almost incredible.