24S Aiialyfis of Steel. 



nbout I- 40th of an inch thick, fealed into it at tlie lamp ; which wire extends to nearly the 

 bottom of the brafs difli in which the tube Hands. 



The exacl diftance between the end of the wire and brafs difli muft be found by trials ; 

 that which generally anfwered in my experiments was about l-2oth of an inch. If it be 

 properly arranged, gaz will be produced at each difchargc. 



The Lcydcn j.ir ufcd with this apparatus muft contain about 150 fquarc inches of 

 coating. 



The diftance between the infulated ball and the prime conductor, at which the experi- 

 ment fucceeded, was commonly about half an inch. 



If experiments be propofed in which cleflrical difcharges mud be palTed through 

 water or other fluids, for even a much longer time than was confunied in performing 

 thofe referred to or related in this paper, it may be an objecl to employ the wind, or per- 

 haps the power of a horfe, to turn tlie eledlrical machines, the expence of labourers being 

 coufiderable. 



[To i' coniinucei.] 



Anal^l/li of four Specimens of Steel; luilh Refeliions on the nenu Altthods employed in this Analyfu. 

 By Citizen Vau^KLIN. 



fContinueil from page 217.] 



SECTION III. 



STEEL KO. 864 — LARGE PIECE. 



ILXPERIMENT J. 1152 grains, or 6t,i4 grammes, of this flecl, brok«n into fmall 

 particles, were dilTolved in the fulphuric acid diluted with five parts of water. There re- 

 mained at the bottom of the folution 5,5 grains, or 0,292 grammes, of black powder of the 

 carburet of iron. In another experiment, the fame quantity of this ftcel afforded 6,4 of 

 carburet of iron ; a quantity, the medium of which is 5,95, and confcq«ently the refiduc 

 forms a fraflion of the dinblved mafs equal to 0,005 1. 



Experiment II. 100 grains, or 5,3 grammes, of the U\mt (leel, diflblved in the fulphuric 

 acid, afforded 121 inches, or 2420 cubic millimetres of hydrogene gas. The black refiduc 

 weighed fcarcely 0,75 grains. 



Experiment III. The 5,5 grains of carburet of the firft experiment being fubjeGcd to 

 heat under a muffle, took fire, and left three grains of a grey yellowifli mafs, which, when 

 treated with boiling muriatic acid, affumed a white colour, while the acid became yellow. 

 It was reduced to J,66 grains, which amounts to 0,0014 '^^ 'he mafs of ftccl. This fub- 

 ftance pofrcfPed all the charaflers of (ilex. 



The muriatic acid ufed in this boiling contained a perceptible quantity of Iron, which ap- 

 peared to be the caufe of the yellow colour it polTtfred previous to the operation. 



Experiment IV. T4ie folution of 1152 grains of iron in the fulphuric acid having been 

 treated as in Experiment III. SeCllon 2, afforded 58 grains of pliofphate of iron, which 



t makes 



