15(5 Mi.vtcr — Oxides of Vanadium, and Uranium. 



oxygen gave results differing widely in percentage but only 9° 

 per gram. If the highest be taken, 'then 3U0 2 + 2 = 77,900°, 

 and this will make the derived figure for U + 2 = 255,400°. 

 Regarding the figures under sodium dioxide it will be observed 

 that the results 895,500° and 269,700° are derived from com- 

 bustions of the metal and that the correction for 2\5 per cent 

 of oxygen is large, while 86,400 is derived from the combustion 

 of U0 3 and U a 8 . It would appear that the results with sodium 

 dioxide are not reliable. But it has been shown in previous 

 papers that the method gives results with carbon, sulphur and 

 titanium which agree closely with those obtained by burning in 

 oxygen. In conclusion it may be stated that no explanation 

 has been found for the high results by sodium dioxide. 



