662 MINERALS YEARBOOK
 The companies producing garnet in the United States in 1931 and 1932, with
the location of the deposits from which the garnet was obtained, are as follows:

 Barton Mines Corporation, North Creek, N.Y. Deposit at North Creek, Warren
County, N.Y.
 Ford Motor Co., Dearborn, Mich. Deposit at Danbury, Merrimack County, N.H.
 Garnet Products Co., South Danbury, N.H. Deposit at South Danbury, Merrimack
County, N.H.
 Warren County Garnet Mills, 149 Orange Street, Newark, N.J. Deposit near
Riparius (Johnsburg), Warren County, N.Y.
 Emery (including corundum) .—Emery, a mixture of corundum and magnetite,
used principally in the metal trades, is being replaced extensively by artificial
products. The value of the domestic production of emery declined 72 percent
in 1932 from the yearly average for
1928—31. The slump in imports of emery, which far exceed domestic production,
shows even more the effect of the substitution of artificial abrasives. In
1932 the value of imported emery ore was $5,524, a decrease of 92 percent
from the average of $70,884 for the 4 preceding years.
 The mineral corundum, a natural aluminum oxide surpassed in hardness only
by the diamond, has been supplanted largely for abrasive use by synthetic
products. No production of corundum in the United States has been recorded
since 1918, but an appreciable tonnage is imported. The quantity of corundum
ore imported during 1932, however, compared to the average for 1928—31,
declined 93 percent, the value dropping to $8,258.
 The following table gives the production of domestic emery for the past
5 years:

Emery sold or used by producers in the United States, 1928—3~
Year
Short tons
Value
Year
Short tons
Value
1928                  
1929                  
1930                  
1,341
924
555
$16,787
10,722
5,996
1931                 
1932                 
512
250
$5,557
2,781
 The companies reporting sales of emery in the United States in 1931 and
1932, with the location of the deposits from which the inaterial was obtained,
are:
 Keystone Emery Mifis, 4329 Paul Street, Frankford, Philadelphia, Pa. Deposit
near Peekskffl, Westchester County; N.Y.
 Smith & Ellis, Peekskill, N.Y. Deposit near Peekskill, Westchester County,
N.Y.
ARTIFICIAL ABRASIVES

 In 1931 the production of artificial abrasives was only slightly more than
one hail of that reported for 1930. In 1932 the production of silicon carbide
was about 41 percent more than it was in 1931, although the production of
the group as a whole declined 12.3 percent.
 Artificial abrasives may be divided into three main groups: (1) Metallic
abrasives, such as crushed steel, steel shot, and steel wool; (2) metaffic
carbides, chiefly silicon carbide; and (3) synthetic aluminum oxide. The
metaffic abrasives are used chiefly in loose form as cutting agents in sawing
or drilling rock and other hard materials.