Converfion of Iron into Steel. 405 



obtained by fufion in a wind furnace: the grain of its frac- 

 ture, after having been forged, fuJly confirmed the opinion 

 which we formed of it when caft. 



The ingots almoft always exhibit on their fracture i'mal! 

 cavities, which it might be fuppofed would produce faults 

 in the forging: but as they are clear and free from all 

 foreign matter, thev form no obftacle to the union of all the 

 parts. Befides, it will be eafy to prevent this accident by a 

 ■(lower cooling in the ingot mould, which will naturally take 

 place in operating upon larger mafles. We ought not to 

 omit that this fteel, when forged into bars, is exactly in that 

 ftate which Rlnman indicates as one of the characters of caft 

 fteel. Its fpecific gravity is to that of the fineft fteel, not 

 caft, in the proportion of 7*917 to 7*79- 



However conclusive thefe refults may be, it appears that 

 fomething would ftill be wanting, if we did not at the fame 

 time produce a fpecimen of what an able hand, accuftomed 

 to manage the Englifh caft fteel, can do with ours in the 

 fabrication of thofe inftruments to which Englifh fteel gives 

 lb much fuperiority : we have the fatisfa&ion of being able 

 to exhibit this proof alfo of the utility of C. Clouet's dif- 

 covery. 



A bar of fteel arifing from the caft made at the Depot des 

 Machines du Confervatoire, was delivered by C. Molard to C. 

 Lepetitwalle, proprietor of the national manufactory of fteel 

 razors at the Quinza-v'tvgts, faubourg Antoine. He made 

 of it three razors, viz. two without any preparation, and one 

 after having taken away the appercus (the name given to the 

 fmall filfures found at the furface and on the edges). This 

 artift declares, that ""the latter was manufactured with great 

 facility, eonfidering the quality of the metal ; that it will 

 bear comparifon with thofe of the fine Englifh fteel named 

 JMarfchall and B. Huntzman ; and that all the three are ex.-,. 

 (•client lor any beard whatever." 



(liihcrto we have confined ourfclves to an examination of 

 Ddj uk-. 



