392 , SALTS 



tion of nitrate of bismuth as prevented the salt 

 from being thrown down by water. Phosphate 

 of soda being poured into this solution, a white 

 precipitate fell, which was phosphate of bismuth. 

 When collected on the filter, washed, and dried 

 in the open air, it constituted a white tasteless 

 powder, insoluble in water, and apparently neu- 

 tral ; 5*22 grains of this salt when exposed to a 

 red head did not melt, but lost 1 grain of mois- 

 ture. Hence, its constituents are 



Anhydrous phosphate 4-22 or 13-5 

 Water . . 1 - 3-199 



5-22 



I consider its constituents to be 



1 atom phosphoric acid 3-5 

 1 atom oxide of bismuth 1 

 3 atoms water . . 3*375 



16-875 



6. Arseniate of bismuth. This salt was formed 

 by the same process as the last, merely substi- 

 tuting arseniate of soda for phosphate of soda. 

 When the arseniate of bismuth was collected on 

 the filter, washed, and dried in the open air, 

 it constituted a white powder with a slight shade 

 of yellow. It was tasteless and insoluble in 

 water, and did not alter vegetable blues ; hence, 

 I consider it as a neutral salt. 19'75 grains of 



16 



