08 On the Alloys of Steel. [ 1 822. 



Table of Specific Gravities of Alloys, $c. mentioned in the 

 preceding Paper. 



Iron, unhammered 7*847 



Wootz, unhammered (Bombay) 7*665 



Wootz, tilted (Bombay) . . . V . . .' . 7-6707 



Wootz, in cake (Bengal) . . . . - * . . . 7*730 



Wootz, fused and hammered (Bengal) . . . 7*787 



Meteoric iron, hammered . . . 7'965 



Iron, and 3 per cent, nickel 7*804' 



Iron, and 10 per cent, nickel 7*849 



Steel, and 10 per cent, platinum (mirror) . . 8*100 



Steel, and 10 per cent, nickel (mirror) . . . 7*684 



Steel, and 1 per cent, gold, hammered . . . 7*870 



Steel, and 2 per cent, silver, hammered . . . 7*808 



Steel, and 1*5 per cent, platinum, hammered . 7*732 



Steel, and 1*5 per cent, rhodium, hammered . 7*795 



Steel, and 3 per cent, nickel, hammered . . . 7*750 



Platinum 50, and steel 50, unhammered* . . 9*862 



Platinum 90, and steel 20, unhammered f . . 15*880 



Platinum, hammered and rolled 21*250 



On the Alloys of Steel. By STODART and FARADAY J. 

 [Read March 21, 1822.] 



THE alloys of steel made on a small scale in the laboratory of 

 the Royal Institution proving to be good, and the experiments 

 having excited a very considerable degree of interest both at 

 home and abroad, gave encouragement to attempt the work 

 on a more extended scale; and we have now the pleasure of 

 stating, that alloys similar to those made in the Royal Insti- 

 tution have been made for the purpose of manufacture ; and 

 that they prove to be, in point of excellence, in every respect 

 equal, if not superior to the smaller productions of the labo- 

 ratory. Previous, however, to extending the work, the former 

 experiments were carefully repeated, and to the results were 

 added some new combinations, namely, steel with palladium, 



* The calculated mean specific gravity of this alloy is 11 '2723, assuming the 

 specific gravity of platinum and steel as expressed in this Table, 

 f The calculated mean specific gravity of this alloy is 16'0766. 

 J Philosophical Transactions, 1822, p. 253; also Phil. Mag. vol. Ix. p. 363. 



