XXIX. Account of Mr, Mushet's neiv Methnd of making 

 Steel of various Qualities, 



IT^ O R this invention Mr. Mufliet* has obtained his Ma- 

 Jefty's royal letters patent ; and, certdinly, few dileoveries of 

 fo much importance to this country have bectl made for a 

 number of years pa(h Th€ manufacture of caft fteel, which 

 has hitherto been tedious and expenfive, is novv reduced to a 

 procefs of a few hoars ; and the quaUty of the article at the 

 lame time fo much improved^ ;:s to be applicable to many 

 purpofes to which fteel of the common manufa6hii*e cannot 

 be applied. We (ball not, however, dwell on the utility of 

 the invention, but lay before our readers an account of it, 

 extrafted from Mr. Mufliet's fpecification, which will fpeak 

 more to an • intelligent mind than would a volume of 

 culogium. 



'' The general principles of my procefs of pfocelTes are 

 the fufion of malleable iron, or of iron ore, in fuch manner, 

 and by fuch means, as immediately to convert them into 

 caft fteei ; and, likewife, in certain cafes, the after cement- 

 ation ot this fteel to give it malleability, and the property of 

 welding, in order to fit it for fuch purpofes as require fteel 

 poflcfling thefs^ properties. Thefe principles can be a6led 

 Upon for the production of the various qualities of fteel in a 

 Variety of ways ; but the principle of my inventioti, and the 

 mode of operation, may be fully underftood by the examples 

 whii:h I fhall adduce, and which will enable any perfon to 

 perform the fame, and to vary and alter the mode of operation 

 according to his intention, and the particular quality of fteel 

 he may wifti to manuFa6ture. ^ 



^' Thus, caft fteel may be made by taking any convenient 

 qiumtity of malleable iron, according to the fizeof the furnace 

 and crucible or crucibles to be employed, and introducing it into 

 the crucible or crucibles along with a proper proportion of 

 charcoal j charcoal duft, pit-coal, pit-coal duft, black lead, or 



■•■ The fame gentleman to \vh(im the public are indwbied for the feries , 

 of^ valuable papers pn the nianufafture of call irou, given in the preceding 

 volumcii «f the Philolbphical Macinzine. 



G 2 2J pliimbagp. 



