New-York tribune., 1902-06-24
ABRASIVE MATERIALS.
uHEIR PRODUCTION AND Use IN THIS
COUNTRY - EXPORTS OF GRIND
STONES ENCEEn INPOKTS.

Washington June % tSpeciaD-Abrasive mate
Tials are. a whole. but little understood, al
though they in sense among the most I'M
portant of mineral products says Dr. Joseph Hyde
Pratt in Mineral Resources Of the United States
1901" now in press United States Geological Sur
rey. The principal abrasiyes fan into three gen
groups: those which occur rock torna-
fions. and and manufactured directly into
she form desired. while retaining their orislna
rock structure and appearance. as Erindstones
whetstones etc; these which occur consutu-
ent Of either a rock vein, and have to be
mechanically separated and cleaned. as corundum
emery and garnet artificial abrasives, as carbo-
rundum crushed steel and artificial corundum
The use OF abrasives is growing with tie increase
OF our manufacturing industries. The total value
natural abrasives produced in the United states
fn 1901 Sll94572. compared with $l2oS07S for
1900
Corundum and emery put upon the market
,n the three foTmS-as grains OF powder. as emery
paper and WHEELS and blocks OF various shapes
and sizes The total amount of emery and cOrun-
produced in the United States in 1901 450J
short tons. valued at s146o4o, compared with
1896 short tons, valued at i02715, in 1900.
The imports of emery into the United States in
1901 amounted S29i 900. compared with 23e5o6
IN 1906
The experiments in producing artificial abrasives
that have been in progress during the last fifteen
years have met with success, and there are now
three artificial abrasives the market-carborun-
dun. crushed steel and artificial corundum- Car
borundum IS produced by the Carborundum Com
pany Niagara Falls. and in 1901 the total produc-
lion of carborundUm 3,S5Sl75 pounds, valued
at from s to 0 cents a pound, compared with
4o1 900 pounds in 1909. CarboTundum is now used
a certain extent a general abrasive Crushed
steel is used in the cutting trade particular
" by the marble and granite cutters The pro
duction Of crushed steel by the Pittsburg Crushed
Steel Company in 1871 amounted to 100000 pounds,
being 10.ooO pounds less than the production Of
1900 A new industry has been started in the
nanufact cture of artificial corundum- The Norton
Emery Wheel Company has erected plant at
Niagara Falls for the manufacture Of artificial
corundnn. and already two or three carloads OF
the material have been manufactured and mace
into wheels. etc-. which are reported as giving
At the present time garnet is obtained in four
No,fh Carolina. In Ney-York the garnet is OBJ
tanned from near North Creek and Minerva; IN
River. and in Essex County. In Connecticut. gar
net is found near Roxbury- Litchtieid County.
Most of the garnet mined is used in the manu-
.Sfensvey mpoved for abrasive purposes espe
SaII,. :, ,l,a rI,9,,,fac+,lra Of hoofs and shoes
Practically all the garnet produced IN North Caf0
as emery wheels The production for 1901 as re-
ported to the Survey is 80 short tons ] yanea az
slaslea. compared with SIS tons valued at
23475 in 1890 The average value ton 81 In 1,5
sSS 7e the value a in 1890.
Milistones found in various localities in the
are located in belt ot sandstone and congIomer-
ate the Shawangunk Mountains, extending
nyarsinc, Gardener, New-Paltz: in Ulster County,
and The product is known as "Esopus stone
a good many buhrstones are still imported from
France Belgium and Germany and they are con
sidered more satisfactory than the American
stones The production of miilStones in lStl
amounted TO s57l79 as compared with S32, ,SS in
1850 and with SOS Us I'm 1893 The value Of the i'm
1orts of 1nillstones and buhrstones in 1901 was
S4eIS? as compared with S2S904 in 1890.
The total value OF the production OF all kinds OF
syrndstones in 1901 $5S0.7GS decrease II $l2s-
ps from the production Of 1896 which S11oe6.
(5rindsfones continue be imported into the
United States and they from Newcastle-on-
Fryne in England: from Edinburgh, Scotland and
from Bavaria. The imports in 1901 amounted TO
Sss 81 as compared with s925I in 1850
The total export Of grindstones from this country
is now greater than the import