The times dispatch. [volume] (Richmond, Va.) 1903-1914, 1913-02-23
MINERAL STUFFS
AND BY-PR0DUCTS
Resources of South May Pay so
Per Cent More in
By-Products.

Professor j. Sanhali Grasty writes
the Tradesman an interesting article
on the mineral resources Of the South.
and he says. or, at least, intimates that
the South is losing great deal by
not looking after the by-products as it
should Professor Grasty says:
Nowadays when waste materials arc
converted into useful by-products. slate
operators are figuring on how they
can make some profitable disposition
OIL the decaEed slate occupying the
zone OF weathering between the solid
and unaltered material below, where
IL is suitable for quarrying. and the
weathered or decayed slate or toppinr
above, which extends from the sur
race down to the solid commercial
slate. IT has been suggested that this
oVerburden of weathered slate which
has to be removed in order that the
workable slate may be reached. could
be employed to manufacture brick and
other ceramic materials. With this
In view, the National Slate Mining and
Exploratory Corporation induced the
Bureau OF Standards 10 conduct num-
Der OF tests on large samples These
were completed in October, 1912, with
unusually satisfactory results Two
samples were submitted, one of tic
topping material and the other OF tho
tests be made (a) using the topping
material alone and (b) with q mix
ture of two parts of topping mate
rial and one of slate. The trial pieces
were then burnt in a test kiln of about
ten cube feet capaciy. fred with natu
raj gas. The Bureau of Standards re-
ported as follows:
both materials appear to be suit
able Tor the manufacture of dry press
ed Dick of good red color. No evil
oence OF discoloration has been OBJ.
served. and there seems to be no nh
jections to the utilization of these
states. AS much Of the top material
/ should, be used as possible. and ii is not
ADVISABLE to use more of the lower.
kia'e than III the proportion OF two OF
TOP states TO one OF the bottom ma :
terial for best results
1T is suggested that the GRINDING
De hne enough so that all materia /
passes at least a twelve-mesh sieve"
since The test made by the Bureau
or Standards was completed, the Ma :
tionai Slate Mining and Exploratory
corporation organized by DIR. John o.
ROE "a clinton Avenue. South Roches-
Ter ~ ", has investigated tile mat
ter OF the utilization of this waste ma
terial even further than il was car
req py the Bureau OF Standards. the
subsequent test having been made on
yer! large samples and the question of
the manufacture of the slate topping
conducted under actual working con
ditions.
AS result. this corporation. which
owns large valuable slate deposits both
IN virginia and Georgia, and is capt
'a''"ed at 100000. plans to erect
works At it's ouarries 10 manurac,,ra
orick and tile and other ceramic mate
rials IN addition also TO quarrying sla tie
on large scale. II will not only pro
duce slate for roofing purposes. but
state also for stock and electrical pur
poses.
ny inheritance OF the success OF the
experiments of the National Slate AIin.
ing anu Exploratory Corporation will
readily be realized when it is remem
nered that in the case of most of The
larger quarries, the depth of the ton
ping ranges from fifteen up to fifty