Practical dental metallurgyA text- and reference-book for students and practitioners of dentistry .. . lame, and explosion is rendered almost impossible. In Fig. 21 is represented a self-acting lamp and blow-pipe. The lamp reservoir andthe boiler will each hold abouta half-pint of alcohol. Light-ing the flame under the boilervaporizes the alcohol in itrapidly, the pressure forcingthe vapor through the pipeinto the large flame at the sideFig. 20. of the lamp, forming a very practicable and efficient blow-pipe. The force of the blast is regulated by raising or lowering the boiler; the spread of
Practical dental metallurgyA text- and reference-book for students and practitioners of dentistry .. . lame, and explosion is rendered almost impossible. In Fig. 21 is represented a self-acting lamp and blow-pipe. The lamp reservoir andthe boiler will each hold abouta half-pint of alcohol. Light-ing the flame under the boilervaporizes the alcohol in itrapidly, the pressure forcingthe vapor through the pipeinto the large flame at the sideFig. 20. of the lamp, forming a very practicable and efficient blow-pipe. The force of the blast is regulated by raising or lowering the boiler; the spread of the flame by using the larger or smaller nozzle. The ap-pliance is substantially made of spun brass, and the boiler is provided with a safety-valve. A set-screw on the upright permits the boiler to be raised or lowered or swung to one side. One of the nozzles is carried on the top of the safety-valve; the other in position on the pipe. Gas Lamps.—The gas may be most effectively usedby an apparatus on the principle of the one illustratedin Fig. 22, which consists of a sort of duplex 76 PRACTICAL DENTAL METALLURGY. Compound Blow-pipes.—The difficulty in maintain-ing a flame of uniform size and intensity, owing to thefact that the blow-pipe and lamps are separate, the lack of latitude allowed the op-erator by the fixed positionof the blow-pipe, and theintroduction of gas in theexperimental laboratory ledto a form known as the com-pound blow-pipe, Fig. instrument is so con-structed that it virtuallyconsists of a lamp and blow-pipe all in one. In generalit consists of two metallic
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Keywords: ., boo, bookcentury1800, bookdecade1890, booksubjectdentalmetallurgy
