i2'24! EXPERIMENTS ON WOOT^. 



Thcapprar- "icfs at a low heat, one of them contained a number of crack* 

 anccs on forging and filllires. The fra61ure was gray, tore out a little in break- 



Thc cake ot . , , •/• n i «. i i r ,• »• 



wools. No. I. *"&> but was otherwile yolky and exceilively denle. A Imall 



bar of penknife lize was improved greatly in drawing down, 

 and had only one crack in thirteen inches of length. The 

 grain and fradure were both highly improved by this addi- 

 tional labour ; the tenacity of the fteel was greater, and it 

 Hood firmly under the hammer at a bright red heat. 



The other two quarters of this cake were fquared a little, 

 and fucceffively put under a tilt hammer, of two hundred 

 weight, going at the rate of three hundred blows per minute, 

 and drawn into fmail penknife fize. One of the bars from an 

 outfide piece, always the moft folid, was entirely free from 

 cracks, and had only one fmall fcale running upon one fide. 



Thefe bars exhibited a tougher break, than thofe drawn by 

 hand ; the colour was whiter, and the grain pofleiTed a more 

 regular and fiiky appearance. 



(To be continued.} 



*^* I have received a letter fro?n Mr. Boswell, in which 

 he exprejfes an opinion, that it is unfair in the Old Correjpondent 

 zihofe letter appeared in our Inji Number to have applied Mr. B's 

 apology to one particular part of his paper; as he conceives, that 

 it ou'^ht to have been considered as indicating the fpirit in which 

 his whole communication was written. 1 liave inferted thisfhort 

 notice out of refpeSt to the writer ; hut have declined infcrting tlic 

 ktter itfelf, bccaufe the controverj]/ can have no farther importance 

 to the readers of this Journal, after thefuhjcdt itfelf hax been 

 exhaujied. 



