OF BARYTES. 283 



is difficult to make out the form. Its constitu- 

 ents are 



1 atom acetic acid 6*25 



1 atom barytes 9-75 



3 atoms water 3-375 



19-375 



It is not sensibly altered by exposure to the air, 

 at least in my laboratory which is rather damp. 



9. Oxalate of barytes is a white tasteless pow- 

 der, obtained when oxaiate of ammonia and ni- 

 trate or muriate of barytes are mixed in the ato- 

 mic proportions. It is not sensibly soluble in 

 water, and does not affect vegetable blues. When 

 17'625 grains of it are exposed to a red heat in 

 a platinum crucible, there remain 12'5 grains of 

 carbonate of barytes, equivalent to 9 '75 grains 

 of barytes. Hence, the constituents of the salt 

 are 



1 atom oxalic acid 4-5 

 1 atom barytes 9' 7 5 



3 atoms water 3 '3 7 5 



17-625 



10. Binoxalate of barytes was formed by de- 

 composing the muriate of barytes, and digesting 

 the precipitate with twice the atomic quantity of 

 oxalic acid requisite to saturate the base. It 

 crystallizes in needles so irregular that their 

 shape could not be determined ; it has but little 



