. The Dental cosmos. Putting point on strip of metal for tubing. which will be about three times as broadas the diameter of the tube. Make apoint at one end by cutting a smallpiece off each side of the strip (), then anneal. Xow with a piece ofhard wood or a piece of metal in whichthere are a number of semicirculargrooves, the edges of which in the latterhave been rounded off (Fig. 20), tap Fig. Grooved wood block on which strip ishammered up. the strip into one of the grooves withthe narrow end of a hammer (Fig. 21),commencing near the edge. The ham-mering should be continued till
. The Dental cosmos. Putting point on strip of metal for tubing. which will be about three times as broadas the diameter of the tube. Make apoint at one end by cutting a smallpiece off each side of the strip (), then anneal. Xow with a piece ofhard wood or a piece of metal in whichthere are a number of semicirculargrooves, the edges of which in the latterhave been rounded off (Fig. 20), tap Fig. Grooved wood block on which strip ishammered up. the strip into one of the grooves withthe narrow end of a hammer (Fig. 21),commencing near the edge. The ham-mering should be continued till the tubeis fairly round and the edges almostclosed, and the latter are then scrapedvn ith a three-square scraper to insuretheir being perfectly clean, the annealinghaving put on a fire skin. Anothermethod is to place the strip of goldlengthwise along the groove in the block GIRDWOOD.—TUBE TEETH AND POBCELAIN RODS. 611 and with a steel rod slightly smallerthan the width of the groove drive themetal strip and mandrel into it, follow- Fig 21.
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