. American engineer and railroad journal . ed out of the solid. 1;^ in. eqimre. and 12 , is i)laeed upon supports n in. npnrt. and a tup wei^^liiuR l,1301bp. iedropi)ed from a height of one foot u]>on the specimen, and the pieceturned over after each blow. *j V c a. Sj < 0 V S 0 a Description of =7Sa 0 Oc 0 CQ0 § Material. Pa u ^5 0IS Remarks. OS al 0 S c 0 s 1^ a K 15 H w Ordinary forging Deflerlcd freely iiiidir 8tpel ! sam n drop. 4,T Admiralty cranlc Deflected freely under steel , MAO 3tf 45 drop. Deflec!(.-d ^freely under .•.; Fhiid compressed steel
. American engineer and railroad journal . ed out of the solid. 1;^ in. eqimre. and 12 , is i)laeed upon supports n in. npnrt. and a tup wei^^liiuR l,1301bp. iedropi)ed from a height of one foot u]>on the specimen, and the pieceturned over after each blow. *j V c a. Sj < 0 V S 0 a Description of =7Sa 0 Oc 0 CQ0 § Material. Pa u ^5 0IS Remarks. OS al 0 S c 0 s 1^ a K 15 H w Ordinary forging Deflerlcd freely iiiidir 8tpel ! sam n drop. 4,T Admiralty cranlc Deflected freely under steel , MAO 3tf 45 drop. Deflec!(.-d ^freely under .•.; Fhiid compressed steel .33.(K 4(1 57 diop. TK Special W. & B. Delltction much Icpb cranli steel. .. 134 00 . 50 80 73 78 thiin the otbere. Another subject in connection with foigings is that of theproper allowance for tooling. This is a question on which alltlie doctors differ, and can best be .solved by the applicationof a little common .sense. Engineers will ,isk for three-six-teenths on a doulde crank, and others will allow half an inch. slliAMEl! ■XIKGINIA nF TllK l.( loIHtlrll :. on a plain bar of similar size. Both are wrong ; a very goodrule for articles having but one setting is to allow \ in. up to5 in. diameter, i; for fl in., T in. and 8 in., A in. for 10 in., and1 ill. for 1 ft. Most turners will agree that an allowancesufiicieiit to clean up the forging all over is more easily dealtwith than a closely forged shaft, which has to be humored inthe lathe, and rec)iiirin,!r its centers altering several a good lallie. a good man. and a straight forging, noone need complain if an extra eighth has been left on by the forgeman. ^ THE TWIN SCREW STEAMER VIRGINIA. TiiK illuslralioiis on jiagcs 228 to TAO give a very good ideaof the general external apjiearance of the twin .screw steamerViryinxa of the Goodrich line, together with the method ofconstruction both of the hull and the engines. The dimen-sions of the vessel are: Lenglh over all, 277 ft.; length ofkeel
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
