TRANSACTIONS OF THJi SECTIONS. 71 



Grains, 

 calcium or strontium : precipitated by carbonate of ammonia 

 and phosphate of soda the magnesia was equal to magnesium. '187 

 The liquid acidulated with nitric acid, precipitated by ni- 

 trate silver, gave chloride of silver ^ chlorine 1 ■ 1 24 



As "IS? magnesium is equal to '560 chlorine, and the re- 

 maining '564 chlorine to '376 sodium, it follows that the 

 loss was r543. As this loss was enormous it was sup- 

 posed to be water of the muriate of magnesia ; to prove 

 which some magnesia was dissolved in muriatic acid, eva- 

 porated to drj'ness at the same heat, and found = 19'8 grs. 

 while hot ; decomposed by heat in a platina dish it weighed 

 7"45 only. This loss was equivalent to r428 on the mu- 

 riate of magnesia of the spirituous solution, the difference 

 between r543 and 1'42S being caused by inequality of 

 heat or extractive matter. 



The spirit salts were therefore Chloride magnesium. . . . "747 



Chloride sodium "940 



Water 1-543 



B. — Acted on the remaining salts with water containing enough 

 alcohol to prevent the solution of sulphate of lime ; evapo- 

 rated to dryness and re-dissolved in as little water as pos- 

 sible to leave behind any sulphate of lime which might yet 

 have been dissolved ; evaporation under the microscope 

 showed the mass to be composed of the remainder of the 

 common salt, sulphates of magnesia and soda. The ma- 

 gnesia was precipitated and found to be '312 gr. After the 

 addition of niti'ic acid to suspend the phosphates, nitrate 

 of silver precipitated chloride equal to chlorine '700, Then 

 nitrate of barytes gave sulphate equal to suljihuric acid 

 r360, of which '620 was lequired by the magnesia, the 

 remaining '740 by soda, while the '700 chlorine was equal 

 to '466 sodium. 



The water salts were therefore : 



Sulphate magnesia '932 



Sulphate soda 1'334 



Chloride sodium IT 66 



Loss T88 



C — The pulverulent residue M'as acted on by muriatic acid 

 with alcohol ; it effervesced ; after decantation the fluid was 

 precipitated by oxalate ammonia, which, heated red, gave 



carbonate lime '680 



Ammonia gave red oxide of iron "021 



Phosphate of soda gave on concentration a trace of ma- 

 gnesia. 



D. — The remaining ir53 was treated with boiling muriatic 

 acid diluted, but with no alcohol ; it was all dissolved but 

 •220, which was taken as silica, the sulphate of lime being 11 31 



