. Electric railway journal . merican Abrasive Metals Com-pany, New York, after three years of service tests. Thistread is a combination of iron or steel with alundum, oneof the strongest and toughest abrasives known. Grains ofalundum are embodied in and under the surface of themetal to obtain a uniformly gritty surface. Plates withthis surface are made in any size, thickness or shape andin ribbed or hatched designs. The manufacturer recom-mends the square hatched surface with scoring extendingdiagonally from the nosing. The ribbed design is madeonly when it is specially called for, as the comp
. Electric railway journal . merican Abrasive Metals Com-pany, New York, after three years of service tests. Thistread is a combination of iron or steel with alundum, oneof the strongest and toughest abrasives known. Grains ofalundum are embodied in and under the surface of themetal to obtain a uniformly gritty surface. Plates withthis surface are made in any size, thickness or shape andin ribbed or hatched designs. The manufacturer recom-mends the square hatched surface with scoring extendingdiagonally from the nosing. The ribbed design is madeonly when it is specially called for, as the company believesthat any surface with a rib parallel to the nosing on a stepor stair tread is dangerous, particularly in catching highheels. These treads have the anti-slip element in the very edgeof the step, where people are most likely to place their feetwhen getting off a car or descending stairs. The sharp pro-jecting alundum grains cut through snow and mud and willeven penetrate a thin coating of ice to bite the soles of a. Flat-Arch, Semi-Steel Car for Houston, Tex. angle iron, reinforced at each end with angle iron, whichis bolted to the side sill filler through the angle iron andend sill. The trap doors are of T-iron with angle iron braces inthe center bolted securely to the cross timbers. The plat-form knee irons are bent to shape. The trolley boardsextend the full length of the car and are screwed to theribs. The base blocks are bolted to the trolley boards. Theribs are of oak, set in rubber and fastened to T-iron postswith stove bolts. The window rests are copper flashed at the posts andfastened to the angle iron with bolts. The upper side andend panels are of No. 16 sheet steel lined with agasote onthe inside. Both the lining and the sill are fastened to thepost and seat rests with stove bolts and to window restswith screws. The roofing is of agasote molded to shapeand fitted perfectly to the T-iron and letterboard beforefastening. All top sashes are stationary in one
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