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DEPARTMENT OF THE INTERIOR
UNITED STATES GEOLOGICAL SURVEY
GEORGE OTIS SMITH, DIRECTOR
ORGANIZATION, EQUIPMENT, AND OPERATION
ST. LOUIS, MO.
Method used with material that passes 1-inch screen.
PLATE I. General view of buildings occupied by structural-materials test
Accelerated test apparatus for soundness tests of cement; C, Attach-
connections for making void test on “one-size” material
and screenings; B, Apparatus for removing silt from stone screen-
of large material
of filling one screen with material retained on another. VIII. A, Implements used in making density tests of mortars; B, Cast-iron
cube and cylinder molds; C, Spherical bearing blocks for com
inder-rupture through aggregate; C, Compressometers for meas-
rupture of concrete cylinders ..
ing end, 1 cubic yard capacity ...
selected at random to show accuracy of rod spacing; C, Gang saw
for cutting cubes from blocks of stone..
place and stirrups for supporting beam at third points; B, Re-
carriage for handling beams...
B, Method of making bond test..
storage room, building-block section..
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