aS"? Attotyjtj of Steel. 



Experiment V. TJiis ftecl, diflblved in the fulphureous acid, aflbrded very nearly the 

 ftme quantity of carbine of iron as No 864, the fmall piece. 



SECTION 



5TEEI, NO. 1024. 



Exftr'tment 1. Dne hundred grains, or about 5,3gr,"immes, of filings of this fteel af- 

 forded ic8 cubic inches of hydrogene gas during their folution in the fulphuric acid. 



I have remarked that the hydrogene gas produced by this fteel had an extremely fetii 

 Ijmell, infinitely ftronger than that of the gafes afFordeJ by the other fleels, which appears 

 to arife from the greater quantity of phofphorus it contains *. 



Expninienl II. 288 grains of filings of the fame flccl being diflblved in the fulphuric acid,, 

 diluted with five parts of water, the carburet of iron feparated, the folution diluted witlxi 

 water, and the excefs of acid faturated with carbonate of pot-arti, afforded a very confidcr- 

 able white depofition of phofphate of iron, which, when well waflied and dried, remained, 

 white, and weighed 26 grains, or about 0,09 of the mafs of fteel made ufe of. Thefe 26 

 grains of phofphate of iron, treated with cauftic foda, afforded 22 grains of phofphate of 

 foda, and the ferruginous refidue weighed 17 grains. 



Experiment III. 288 grains of fteel, diffolved in the fulphureous acid, left a carbona- 

 ceous refidue, which, treated with pot-ath in tlie manner defcribcd Se£Vion II. and dried, 

 weighed 3,5 grains. But on account of the minirte lofTes which it is impoffibie to avoid ia 

 a numeroos feries of manipulations, the quantity of this fubftance may be eftimated at four 

 grains ; and that the more reafonably, as the other kinds of fteel gave nearly the fame 

 refults. The quantity of carburet of iron in tiiis fteel was therefore ibmewhat lefs than 

 0,014 of the mafs of the fteel. 



Experiment IF. This fteel, fubjefted to the proofs requisite to difcover the prefence of 

 manganele, prefenied no trace thereof. 



S E C T I O N VI. 



Table of the Quantities of Hydrogene Gas afforded by each Kind of Steel. 



By uniting the different quantities of hydrogene gas afforded by the docimaftic quintal 

 of each of the fteels diflblved in the fulpharic add, -we have the following refults for each 

 ICO grains. 



Cubic inches. 



Steel, No- 864, fmall piece ■ — — 108 



No. 864, large piece • ' — — I2i- 



No. 977 — 114. 



No. 1024 _^_ - — 108 



' The fmell of putrid garlick cinitted by iron and fleel during its folution in adds, appears to depend imme- 

 diately on the prcftncc of phofphorus in the metal, of which a portion is diffolved by the hydrogene gas. For 

 this Oflour is more firong In proportion to the quantity of phofphoms. This obfcrvation proves that the propor- 

 tion of this fubftance to the iron which contains it cannot be accurately determined by the proccfs of IbUition J 

 ia acids which emit hydrogene gas. Tlvc fulphureous acid may Bnfwcr this purpofc. 



Table 



