8 JOURNAIv OF THE 



per cent. Percentag-e of ZrOg calculated for Li20.2Zr02 

 is 89.13. 



4. Calcium oxide was also heated for a number of hours 

 with zirconia and gfave the followiug- results: 



ZrOo 70.11 



CaO 29.88 



These residues, after treatment with dilute acetic acid 

 and water, were crystalline. 



5. Barium hydroxide differs from that of calcium in 

 that it fuses readily and thus affords much better oppor- 

 tunity for reaction. The fusion' o-ave abundant evidence 

 of action. The excess of hydroxide was washed out with 

 water. The carbonate present was dissolved away with 

 dilute acetic acid until there was no more barium in the 

 wash water. No zirconia was found in any of these wash- 

 ino-s. Towards the latter part of the washing- the solid 

 particles settled out with great difficulty. The residue 

 was analyzed with the following result: 



Calculated for 

 Found. BaO.Zr02 



ZrOo 55.51 55.95 



BaO 44.49 44.05 



This is a grayish white powder, very fine and easily 

 soluble in hydrochloric acid. Practically all of the zir- 

 conia was taken up, leaving- little undissolved by the hy- 

 drochloric acid. 



6. Strontium oxide was prepared by ignition of the 

 nitrate and heated in the same wa}- as the calcium oxide. 

 This mass was pinkish white, probably from slig'ht im- 

 purities, and was completeh^ soluble in dilute hydrochlor- 

 ic acid. On analysis the following- results were obtained: 



Calculated for 

 Pound. SrOZrO. 



ZrOs 54.22 54.55 " 



SrO 45.77 45.45 



7. The mag-nesia(eig-ht g-rams)and zirconia(two grams; 



