132 COMBINATIONS OF OXIMURIATIC ACID AND METALS. 



with sulphur, no more gas was produced than the expansion 

 by heat occasioned, sulphur sublimed, and a gray sulphuret 

 of tin remained. These results I have several times obtained^ 

 and not only with aurum musivum prepared as the preceding, 

 but with some also made according to Woulfe's process. As 

 no sulphureous acid gas was produced, and as sulphur sub- 

 limed, it may be concluded^ that aurum musivum differs merely 

 from the gray sulphuret in containing a larger quantity of 

 sulphur. My next object was to ascertain the exact propor- 

 tion of sulphur in both these sulphurets, for the sake of com- 

 parison with the combinations of tin and chlorine. 

 Component 100 grains of tin in a finely-divided state, as precipitated 



^ray sulphuret ^'^^^ ^^^ muriate of this metal by zinc, were heated in a glass 

 •f tin, tube intimately mixed with sulphur, the combination of the 



two was accompanied with vivid ignition, the sulphuret formed 

 weighed 1273 grains, and, broken, it appeared perfectly ho- 

 ^ mogeneousj it was pounded, and again heated with sulphur j 



but the excess of sulphur being expelled, the fused sulphuret 

 had not increased in weight. The second time I made this 

 experiment, I obtained the same result, 

 and of aurum 50 grains of aurum musivum, purified from mixed sulphur 

 mnsivum. by exposure in a close vessel to a dull red heat, were decom- 

 posed by a bright red heat in a small green glass tube nicely 

 weighed, and having only a very small orifice ^ the loss of 

 sulphur, by conversion into the gray sulphuret, was equal to 

 93 grains. Hence, as 40*7 grains of gray sulphuret contain 

 8*72 grains of sulphur, 50 grains of aurum musivum appear 

 to contain 18*02 grains, 

 Ratio In which The ratio in which sulphur combines with bodies is lo that 

 sulphur com- in which oxigen and in which chlorine combine, as 15 to 

 dies^compared 7'"^ ^"'^ ^^'^' '^^^^ appears from the proportions of the con- 

 with oxigen, stitueut parts of sulphuretted hidrogen and sulphureous acid 

 tk^aS""""^ gas ; for I have found 100 cubic inches of the former to weigh 

 3S'64 grains, and 100 of the latter 68-44 grains. In the com- 

 parison, therefore, between the sulphurets of tin and the com- 

 binations of this metal and chlorine, 15 by weight of sulphur 

 are equivalent to 33 6 of chlorine. And the tin being as 55, it 

 appears from the analysis of the gray sulphuret and stannane, 

 that the sulphur is to the chlorine as 15 exactly to 33*43 ^nd 



from 



