BAXTER AND CUAPIN. — ATOMIC WEIGHT OF NEODYMIUM, 223 



Fractions 1299 to 1305 were evidently very nearly identical and 

 probably nearly pure, while fraction 1290 apparently contained about 

 ten per cent of praseodymium, cerium and lanthanum. 



At this point fraction 1302, which seemed on the whole to be the 

 purest in this series, was set aside for more careful examination and 

 analysis. Fractions 1303 to 1309 also, which contained the bulk of 



