ABRASIVE MATERIALS 657

Eureka Flint & Spar Co., Trenton, N.J.
Harford Talc & Quartz Co., 4 Reckord Building, Towson, Md.
Mineral Milling Co., 1081 Richmond Street, Los Angeles, Calif.
Minnesota Mining & Manufacturing Co., St. Paul, Minn.
H. P. Scheel Eversharp Pulp-Burr Co., 520 North G Street, Tacoma, Wash.
Spicky Polish Corporation, 1401 Third Street, San Francisco, Calif.
Standard Flint & Spar Corporation, Trenton, N.J.

 Ground sand and sandstone.—Production in the United States of ground
sand and sandstone, known in some localities as silica flour, in 1932 declined
18 percent from that in 1931; the average value per ton decreased about 10
percent.
 Commercially important quantities of ground sand and sandstone are sold
by companies producing glass sand and other special silica sands. This pulverized
silica is used widely in the ceramic trades; as a silica wash for molds in
steel-foundry work; as a ifiler in prepared roofing, paint, and like products;
in fertilizers; and as an abrasive agent in various cleaning and scouring
compounds.
 Recent production data are shown in the following tables:

Ground sand and sandstone sold or used by producers in the United States,
1928—32 1
Year Short tons Value Year
Short tons Value
 [928                    280,402 $1, 966,296 1931                1929   
                302, 139 2,039, 144 1932                1930 241,947 1, 566,815
 183,880 $1, 195,425 150, 109 875,749
1 Includes only finely ground material. Figures probably incomplete.

Ground sand and sandstone sold or used by producers in the United States,
1931 and 1932, by States 1
.
1931

1932


Short tons
Value
Short tons
Value
fllinois and Missouri                         
New Jersey                                
Ohio                                     
Undistributed 3                                                 
58,311
48,257
18,633
58,679
$349, 560
194, 116
146,922
505,827
42,400
58,721
(2)
48,988
$230, 801
252, 141
(2)
392,807

183,880
1, 196,425
150, 109
875, 749
 llncludes only finely ground material. Figures probably incomplete.
 2 under "Undistributed."
 3 1931: California, Delaware, Pennsylvania, West Virginia, and Wisconsin;
1932: California, Delaware, Ohio, Pennsylvania, West Virginia, and Wisconsin.


 The following companies reported production of ground sand atid sandstone
in 1931 and 1932.
 Cape Henlopen Sand Co., drawer 496, Lewes, Del.
Central Sifica Co., Glass Rock, Ohio. *
 Del Monte Properties Co., 401 Crocker Building, San Francisco, Calif.
 Eureka Flint & Spar Co., Trenton, N.J.
 Michigan Quartz Silica Co., Milwaukee, Wis.
 National Pulverizing Co., Millvffle, N.J.
 National Sifica Co., Oregon, Ill.
 National Silica Works, Berkeley Springs, W.Va.
 New Jersey Pulverizing Co., Mifiville, N.J.
 Ottawa Silica Co., Ottawa, Ill.
 Penns3Ivania Glass Sand Co. (grinds in New Jersey, Pennsylvania, and West
Virginia), Lewistown, Pa.