242 THE ATOMIC WEIGHTS. 



In 1865 Delafontaine * published some results obtained 

 from yttrium sulphate, the yttrium being thrown down as 

 oxalate and weighed as oxide. In the fourth column I give 

 the percentages of YtjOg reckoned from the anhydrous sul- 

 phate : 



Sulphate. V/^O^ H^O. Percent. Yt.,0^. 



.9545 gnu. .371 grm. .216 gim. 50-237 



2.485 " .9585 " .565 " 49-922 



2.153 " .827 " .4935 " 49-834 



Mean, 49.998, dz .081 



In another paper t Delafontaine gives the following per- 

 centages of Yt^Og in dry sulphate. The mode of estima- 

 tion was the same as before : 



• 48.23 



48.09 

 48.37 



Mean, 48.23, dr .055 



Bahr and Bunsen,:): and likewise Cleve, adopted the 

 method of converting dry yttrium oxide into anhydrous 

 sulphate, and noting the gain in weight. Bahr and Bunsen 

 give us the two following results. I add the-usual percent- 



•0233 



Cleve'sll results are published in a joint memoir by Cleve 

 and Hoeglund, and are as follows : 



* Ann. Chem. Pharm., 134, 108. 



t Arch, des Sci. Phys. ct Nat., (2,) 25, 119. 1866. 



J Ann. Chem. Pharm., 137, 21. 1866. 



II K. Svenska Vet. Akad. llandlingar, Bd. i. No. 8. 



