148 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 54 



Summing up, the following ratios are now available, from which to 

 compute the atomic weight of lithium : 



(1). LiClO^iLiCl: :100:39.8457, ± .00023 

 (2). Ag:LiCl: : 100: 39.3002, ± .00013 

 (3). AgCl:LiCl: : 100: 29.5789, ± .00013 

 ( 4 ) . LiCl : LiNO., : : 100 : 162.5953, ± .0025 

 (5). Li,COs:CO„: : 100: 59.442, ± .0054 



To reduce these ratios we have — 



Ag = 107.880, ± .00029 N = 14.0101, ± .0001 



CI = 35.4584, ± .0002 C = 12.0038, ± .0002 



Hence- 



From ratio 1 Li = 6.9346, ± .00036 



" ' " 2 6.9387, It .00028 



" 3 6.9395, ± .00095 



" 4 6.9563, ± .0056 



" 5 7.0122, ± .0024 



General mean, Li = 6.9379, ± .00021 



Eichards and Willard, from their three final series of determinations, 

 deduce 



Ag = 107.871 

 CI — 35.454 

 Li = 6.939 



The slightly lower value for lithium given in the general combina- 

 tion above is due to the higher value here assigned to chlorine. From 

 the final silver and silver chloride series of Eichards and Willard, the 

 ratio Ag: CI : : 100 : 32.8637 is derivable. This is a little lower than the 

 value determined by Eichards and Wells directly. 



