tes being slotted, toallow for expansion; iron gas and water pipes have telescopicjoints; furnace bars are made with bevelled ends, and fitloosely into the brickwork of the furnace for the same Very considerable force may be exerted by a hot body incooling. This may be shewn by the following… … Fig. 81. One end D of the bar is turned down and a strong screwcut on it. A nut works on this screw. ^ The other end of the bar is forged to the ^ shape shewn at A, and through this a holeabout 1 cm. in diameter is drilled; theedges of this hole are F shaped, the barcan fit tightly between two…
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