252 SALTS 



beautiful crystals of binoxalate of ammonia : 

 these crystals are partly octahedrons, partly four- 

 sided flat prisms, apparently rectangular, having 

 two opposite lateral edges usually truncated. 

 Taste acid, reddens vegetable blues, and is not 

 altered by exposure to the air. When 20'125 

 grains of these crystals are dissolved in water 

 and mixed with a neutral solution of 12'5 grains 

 of carbonate of lime in muriatic acid, the resi- 

 dual liquid, after the precipitation of the oxalate 

 of lime, is neither affected by oxalate of ammo- 

 nia nor muriate of lime. Hence, the constitu- 

 ents of the salt are 



2 atoms oxalic acid 

 1 atom ammonia 

 8 atoms water 



20-125 



Tartrate. 19. Tartrate of ammonia. The constituents 

 of this salt are 



1 atom tar tar ic add 8-25 



1 atom ammonia . 2' 125 



10-375 



For 1 0*375 grains of it and 20*75 grains of ni- 

 trate of lead exactly decompose each other. 



If the preceding list of ammoniacal salts be 

 sufficiently extensive to entitle us to draw any de- 

 ductions, we may conclude, that about ith of the 



