204 



SMITPISONIAN MISCELLANEOUS COLLECTIONS 



VOL. 54 



First Series. 

 Weight Pb. 

 5.0221 

 5.6396 

 5.5246 

 5.5450 

 7.5108 

 7.5108 

 7.3191 

 7.3221 

 5.9000 

 5.9005 

 15.9990 

 10.0014 

 6.5815 

 6.5812 

 8.9390 

 8.9419 

 0.5095 

 6.5877 



Ratio. 

 95.476 

 95.654 

 95.477 

 95.830 

 95.791 

 95.808 

 95.984 

 90.025 

 95.676 

 95.694 

 95.919 

 95.923 

 95.868 

 95.863 

 95.858 

 95.889 

 95.813 

 95.816 



Mean, 95.817, ± .0109 

 General mean of both series, 95.814, ± .0097 



Hence Pb = 206.73. 



Baxter and Wilson^ determined the atomic weight of lead by analyses] 

 of lead chloride, which had been previously fused in an atmosphere of* 

 gaseous hydrochloric acid. The ratio to Ag and to AgCl were botli de- 

 termined, and the figures obtained, witli vacuum weights, are as follows; 



' Proc. Amer. Acad., 43, 365. 1907. .Journ. Amer. Chcni. Soc, 30, 187. 



