KLISHA MiTCHElvI. SCIENTIFIC SOCIETY. 9 



was heated tog-ether for about four hours and then treat- 

 ed in the same manner as the calcium fusion, i.e., first 

 leached with dilute acetic acid and then washed with 

 water until free from mag-nesia. The residue gave evi- 

 dence of being- crystalline. 



Calculated for 

 Found MgO.ZrOg 



ZrOs 7(128 75.30 



MgO 23.70 24.70 



IV. FUSION OF ZIRCONIA WITH CHLORIDES. 



This method was used by Hiortdahl in preparing- the 

 zirconates of mag'nesium and calcium, and by Ouvrard for 

 the same, and also for strontium, barium and lithium. 

 According- to the latter they all g-ave zirconates of the 

 form MaZrO-j. 



/. Fusion zvith sodium chloride. 



There appeared to be very little action. The fusion 

 was washed with water until free from chlorine. It was 

 then treated as in the case of the carbonates. When two 

 g-rams of zirconia were fused with sixteen g-rams of sodium 

 chloride, it was found that less than two per cent, had 

 been dissolved. In a second experiment, after heating- 

 six hours, the amount dissolved was less than two-tenths 

 of a per cent. 



2. Fusion zvith polassinni chloride. 



No action was observable. When two g-rams of zir- 

 conia were heated a number of hours with an excess of 

 potassium chloride and the mass then treated as above, 

 only three-tenths of a g-ram had been acted upon. There 

 seemed to be even less action in the case of lithium chlor- 

 ide at the temperature attainable by means of an ordinary 

 water-blast lamp. 



J. Fusion zvith alkaline earths. 



Two attempts were made to prepare mag-nesium zir- 

 conate by fusing- zirconia with mag-nesium chloride 

 and ammonium chloride. It was not possible to prevent 



