PROCEEDINGS OF THE AMERICAN ACADEMY 



10036 100.00 



The salt is but slightly soluble even in boiling water. It has no 

 yellow tint. 



22 : 8 : 2 Sodic Phosphoroso-tungstate. — This salt was formed, 

 like the last, by the action of a mixture of phosphorous and chlorhydric 

 acids upon ci-ystallized 10 : 4 sodic tungstate. The action is very 

 energetic. The colorless crystals of the tungstate soon disappear, 

 and are replaced by yellow granular crystals in large quantity. The 

 yellow crystals were well washed upon the filter-pum]! with cold water, 

 and dried on woollen paper. Of this salt, 



1.7082 gr. gave 1.4895 gr. oxides = 87.19 % WO3 + P2O.5 



1.3623 gr. " 0.1870 gr. PoO^Mg., = 8.78 % PoO, — 10.15 % PO3H3 



1.3532 gr. lost with WO.Naj 0.1481 gr. = 10.94 % 



The analyses correspond to the formula 



22 WO3 . 8 PO3H3 . 2 NaoO + 35 aq, 



6514 100.00 



The sodium salt is nearly insoluble in cold water, and but slightly 

 soluble in boiling water. The undissolved portion takes a much 

 brighter yellow color. As in the cases of tlie potassium and ammo- 

 nium salts, a small quantity of a second salt, in very small crystals and 

 of a white color, is formed at the same time. » 



