. Official proceedings . 251. BRAKE SHOE TESTING Mechanism and Motor Control 4. The air brake hose and miscellaneous laboratory handles thework of specification tests of samples representing 600,000 piecesof air brake hose per year. > In this laboratory, tests are madealso of steam and hydraulic gauges, gauge glasses for boilersand lubricators, and hand lantern globes. One of the principaldivisions of this laboratory is devoted to the heat treatment ofmetals and operated in conjunction with this work is a metallo-graphic laboratory with full equipment for pre
. Official proceedings . 251. BRAKE SHOE TESTING Mechanism and Motor Control 4. The air brake hose and miscellaneous laboratory handles thework of specification tests of samples representing 600,000 piecesof air brake hose per year. > In this laboratory, tests are madealso of steam and hydraulic gauges, gauge glasses for boilersand lubricators, and hand lantern globes. One of the principaldivisions of this laboratory is devoted to the heat treatment ofmetals and operated in conjunction with this work is a metallo-graphic laboratory with full equipment for preparing the speci-mens for microscopic examination. Another division is devotedto the determination of the heat insulating qualities of materialsitsed [for passenger and refrigerator car lining and for boiler andsteani pipe lagging. Electrical Laboratory. The numbejpajf incandescent lamps required for use on theentire System is about one million per year. In order to super-vise the purchase of this material, we have equipment
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