138 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 54 



(38). N,05:K,0: :100:87.232. ± .0017 

 (39). KC1:KN0,: : 100 -.135.030, ± .0007 

 (40). KClOjiKNO,: : 100: 82.500, ± .0012 

 (41). NaCliNaNO,: : 100: 145.418, ± .0012 

 (42). NaC103:NaN03: : 100: 79.8823, ±: .0029 

 (43). AgaH302:Ag:: 100:64.0434, ± .0007 

 (44). AgAHA : 2 Ag: : 100: 59.2778, ± .0009 

 (45). AgAH^05:2Ag: : 100: 62.0016, ± .0096 

 (46). AgC,H,0,:Ag:: 100: 47.125, ±.0012 

 (47). Ag:CO,::100:40.723, ±.0071 

 (48). AgCN:Ag::100:80.507, ± .0010 

 (49). Ag:aHjoNBr: :100:194.870, ± .0045 

 (50). Ag:C,H^NBr: : 100: 142.824, ± .0123 

 (51). 2Ag:S::100:14.8581, ± .0006 

 (52). Ag,S04:2Ag: : 100: 69.205, ± .0011 

 (53). 2AgCl: AgoS: :100:86.4733, ± .0011 

 (54). AgoSO, : 2 AgCl :: 100: 91.933, ± .0004 

 (55). Na,C03:Na,S04: : 100: 133.985, ± .0055 



iSTow, using the formulae for the calculation of probable error that were 

 given at the beginning of this work, the foregoing ratios yield twenty- 

 nine values for the atomic weight of silver, as follows : 



From ratios 9 and 24 Ag = 107.666, ± .0279 



" 1, 2, and 45 107.717, ± .0320 



" 1, 2, and 44 107.742, ± .0030 



" 13 and 16 107.791, ± .0011 



" 2, 3, and 48 107.826, ± .0066 



" 5, 12, and 18 107.831, ± .0077 



" 12 and 16 107.857, ± .0058 



" 1, 2, and 46 107.874, ± .0039 



" 1, 3, 5, and 33 107.876, ± .0011 



" 3 and 29 107.878, ± .00036 



" 1, 3, 5, and 34 107.891, ± .0016 



1, 3, 5, and 32 107.908, ± .0015 



" 1, 2, and 43 107.914, ± .0027 



" 4 and 51 107.921, ± .0061 



5 and 14 107.923, ± .0016 



" 5 and 10 107.926, ± .0060 



" 7 and 20 107.927, ± .0013 



" 11 and 15 107.930, ± .0077 



" 6 and 25 107.934, ± .0089 



" 10 and 54 107.937, ± .0066 



" 3, 10, and 30 107.938, ± .0087 



" 5, 7, and 21 107.939, ± .0014 



" 5, 11, and 17 107.940, ± .0101 



" 4 and 52 107.948, ± .0045 



" 10 and 53 107.959, ± .0055 



" 5, 6, and 26 107.988, ± .0118 



" 3, 7, and 31 108.002, ± .0180 



" 2 and 47 108.047, ± .0189 



" 8 and 22 108.094, ± .0540 



General mean, Ag = 107.880, ± .00029 



