53 Cheynkal Experiments on Merairif. 



dentally be formed, it would immediately be decomposed 

 by the phosphorous acid. 



4. Of the Jnalt/sis of the different Mercurial Salts. 



Convinced from the preceding experiments, that the 

 phosphorous acid aflordtd the best means of analysing the 

 jnercurial salts, we attempted the following analyses. 



Of Turhith Mineral. 

 Having boiled ten grammes of this salt, very dry and 

 well prep'ared, till we saw the mercury reduced, we filtered 

 the whole through gray paper. All the reduced mercury, 

 collected in a single globule, weighed 7-7, which, accord- 

 ix\" to the analysis of the rtd oxide of mercury, is equiva- 

 lent to 8*47 of the same oxide. The filleted liquor, treated 

 by the muriate of barytes, gave 5 grammes of sulphate of 

 baryics, which, at 30 per cent, of sulphuric acid, represent- 

 ing rs of this acid. There remains a loss of 3 centi- 

 grammes, which may be attributed to the moisture. — ^This 

 result differs a little from that given by M. Fourcroy. 



Recapitulation. 



Oxide of mercury at the maximum - 84*7 

 Sulphuric acid - - - - 15* 



Loss, probably to moisture, - - 3 



100 



Of Neutral Phosphate of Mercury at the Maximmn. 



Ten grammes of this salt well dried, treated in the same 



manner^^with sulphurous acid, gave the following result : 



Red oxide - - - 63- S 



Sulphuric acid - - 31*8 



Loss by moisture - 4 4 



Of Oxygenated Muriate of Mercury of Commerce. 

 Ten grammes, treated with phosphorous acid, gave of 

 Tunnins; mercury 7*3, which represents 8*03 of oxide at the 

 maximum. 'i"he filtered liquor, treated with nitrate of 

 silver, gave 7*4 of muriate of silver, which represent 1*86 of 

 muriatic acid. This salt being formed by sublimation, 

 <:ontains no water, and we attributed the 11 centigrammes 

 loss to the iron, which is always found more or less mixed 

 with this s^lt as it is met with in commcree. 



2 Result. 



