Show OXYGEN USED TO CUT STEEL little or no finishing required after the operation A stream ot of oxygen is the lie kut knife fe that cuts metals the file is performed by weans means of a blowpipe blow pip pipa with two nozzles of which the first delivers a ai ignited jet of mixed oxygen arid and hydrogen and the second is a stream of pure oxygen tile pressure is regulated by a gatine attached to lo the lie oxygen tank the oxygen hydrogen flame alaine and the of the lie same part of the metal which after being heated by the fame is rapidly cut or rather allied through by tile the oxygen tile the temperature empera dirc bein to 1300 or 1 1406 ani degrees fahrenheit by the combustion of the the cut is as smooth as a sheared cut and leonires leq little or no linis liing armor plates can be b cut jn in one twentieth tile time requited for mechanical cutting and the sharply localized heating healing pro probably causes less strain than dian punching pan ching and develop if oxy oxygen en costs two cents and ds of nf a cent per cubic foot the cosi of cutting till an 11 iron plate late four foill fifths of an tile inch thick Is about EC cc en ell cents per i 1 mining foot or about half the be cost of mechanical cutting cpr clil machines are constructed lor for culling cuttin various ob acts finally ihmie is a mil universal versal nia ma chine chille which car be al ai 1 iid l d to lo make inake curved and polygonal c i s of any pat torn tern in addition to clr fit simpler cuts effected iv i v the other machines A special boim or of this universal machina is exceedingly exee ii eaul in taking anait machinery awl and afteel buildings it op orates crates by cutting culling oft off the heads of the rivets which bich aie ther easily aliven out oui |