24 



1.7336 gram, t" 21".2 sp. Gr. 4.963 

 0.7765 » » » )) » 4.959 



Mean of both determinations: 4.961. 

 Molecular volume: 51.8. * 



2. Acid salt. DigOj, 5V2O5 + 28H2O. A solution of bivanadate 

 of sodium gives with nitrate of didymium an amorphous yellow preci- 

 pitate, probably of the above salt, and the filtered solution deposits soon 

 brillant red crystals. 



0.5458 gram lost at 100" 0.1332 gram HgO or 24.40 percent. 



0.6980 gram lost at about 350'' 0.1982 gram water and gave, by 

 the same method as adopted in analysing the above salt, 0.1339 gram 

 DigOg and 0.3595 gram V2O5. ^ 



In percent: 



Di.,03 19.18 



V,05 51.50 



H2O ...... 28.39 



99.07 1746 100.00 



The loss at 100° corresponds with 24 mol. H2O cale 24.74. 



Spec. Grav: 



1.150 gram, t° 18"'.5 sp. Gr. 2.492 

 - 0.4294 » » » » » 2.497 



Mean of both determinations: 2.494. 

 Molecular volume: 350. 



