ELISHA MITCHELL SCIENTIFIC SOCIETY. 45 
THE DETERMINATIONS. 
All analyses which were completed under the proper 
conditions of the method, as already given, are here re- 
ported. Experiment III became contaminated trom the 
iron support during the prolonged heating and came out 
consequently a little high, giving the ratio of ZrO, : 
ZrOCl,.3H,O as 53.12. In most of the subsequent anal- 
yses the ignition was carried out with the crucible sus- 
pended ina platinum wire cage from a glass support. 
Experiments VI and VIII were dried with an insufficient 
stream of gas, as already stated, and hence were partially 
decomposed. They gave 53.57 and 53.8, respectively. 
The remaining analyses follow: 
ZrOC1,.3H,0. ZrO 9. Ratio. 
OUST: ees cay ool Oooh 2.78459 52.961 
a Sas ee ee 3.53994 1.87550 52.981 
erie vert eit. 40 tse MET TS 3.25036 1,72435 53.051 
I anys Sia ins cms 1.52245 0.80708 53.012 
Mi eee ee ae ae so ee OOS 1.58274 52.969 
MME Te RIES «ule Se ef h'n 201 SF 1.11820 52.949 
Peeretieg Sc.0h ye fs; ues! 2.38139 1.26161 52.978 
MEE ard ais aes os use 1.90285 1.00958 93.055 
RE ee a ascend e's tie ,s 8.61847 1.38658 52.024 
Ee eRe an x xm one 1.07347 0.56840 52.951 
26.64828 14.11953 52.986 
Calculating these for the ratio ZrOC1,.3H,O : ZrO,, 
taking H=1.008, O=16, and Cl=35.45, we have the fol- 
lowing: 
Maximum ratio...... 93.055 Adtoeic weight... ... 1: 91.12 
Mean Ai Pe: 52.986 r OS Fe come ee eae 
Binur p85 oy. 52.951 ? See RS >t Age” 90.61 
The atomic weight as determined by Bailey is 90.65. 
The mean valne given in Clarke’s Recalculation is 90.40. 
I purpose repeating the determinations with the oxychlo- 
ride, with such modifications as have occurred to me since 
the completion of the above work. 
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