1882.] 



251 



[Chase. 



Tri- or Pentavalent ; e, Dg- 



Phyllotactic. Ger 



N Oe 14.0374 9 D3 



P 20 £ 31.1720 20 D3 

 As 48 e 74.8128 48 D3 

 Sb 77 e 120.0122 77 0, 

 Bi 133 £ 207.2938 133 D3 

 Au 126 e 196.3836 126 D3 

 Bo 7e 10.9102 7 D, 

 Ta 117 £ 182.3562 117 D3 

 V 33 £ 51.4338 33 D., 



I have added Bo, Ta and V to 

 this group. The arithmetical 

 .00208 ; Jj, .00212 ; J3, .00215. 



ber. Clarke. Ai Ai J3 



14.031 14.021 .0015 .0005 .0007 



31.180 30.958 .0014 .0069 .0071 



74.833 74.918 .0011 .0014 .0012 



120.043 119.955 .0004 .0005 .0007 



207.347 207.523 .0023 .0011 .0009 



196.434 196.155 .0008 .0013 .0014 



10.913 10.941 .0054 .0028 .0026 



182.403 183.144 .0008 .0013 .0014 



51.447^ 51.256 .0050 .0035 .0037 



the eleraents which Gerber included in 



mean values of the deviations are, J„ 



Metallic 



D,. 



Phyllotactic. 



Gl Id 8.7283 



Al 22 d 27.4318 



Sc 35 8 43.6415 



Cr 42 8 52.3698 



Fe 45 8 56.1105 



Ga 55 8 68.5795 



In 91 '5 113.4679 



Zn 52 ^ 64.8388 



Cd 90 ^ 112.2210 



Mn 43 'I 53.6167 



Ni 46 ^ 57.3574 



Co 47 58.6043 



Cu 51 ": 63.5919 



Pb 166 . 206.9854 



Ru 84^ 104.7396 



Rd 83 ^ 103.4937 



Pd 85 ^ 105.9865 



Ir 155 ^ 193.2695 



Pt 156 ,5 194.5164 



Os 159 8 198.2571 



Yt 72 8 89.7768 



Ce 113 8 140.8997 



La 111 ,5 138.4059 



Di 116 8 144.6404 



Er 133 8 165.8377 



Th 187 8 233.1703 



Ytter 139 8 173.3191 

 The mean deviations are, 



PROC. AMEK. PHILOS. 



Gerbei-. 



7 D, 8.715 



22 D^ 27.390 



35 D, 43.575 



42 D^ 52.290 

 45 D4 56.025 

 55 D^ 68.475 

 91 D, 113.395 

 53 D, 64.740 

 90 D4 113.050 



43 D^ 53.535 

 47 D, 58.515 

 47 D^ 58.515 

 51 D^ 63.495 



166 D^ 306.670 



84 D, 104.580 



84 D, 104.580 



85 D, 105.835 



155 D^ 192.975 



156 D^ 194.330 

 159 D^ 197.955 



73 D, 89.640 



113 D^ 140.685 



lllD^ 138.195 



116 D4 144.430 



133 D^ 165.585 



187 D, 333.815 



139 D^ 173.055 

 , Ay, .00327 ; A^, 



see. XX. Ill 3f. 



Clarke. Ai A-i 



9.085 ,0094 .0408 



27.009 .0003 .0154 



43.980 .0005 .0078 



52.009 .0002 .0069 



55.913 .0016 .0035 



68.854 .0021 .0040 



113.398 .0035 .0006 



64.905 .0015 .0010 

 111.770 .0021 .0040 



53.906 .0017 .0054 

 57.928 .0012 .0099 

 58.887 .0019 .0048 

 63.173 .0027 .0066 



206.471 .0023 .0025 



104.317 .0031 .0050 



104.055 .0005 .0054 



105.737 .0025 .0024 



193.651 .0018 .0033 



194.415 .0031 .0005 



198.494 .0035 .0013 



89.816 .0030 .0004 



140.434 .0030 .0034 



138.526 .0034 .0009 



144.573 .0029 .0005 



165.891 .0007 .0003 



233.414 .0018 .0010 



172.761 .0014 .0032 



.00521 ; 4, .00515. In 



PRINTED MAY 19, 1882, 



A, 

 .0411 

 .0141 

 .0093 

 .0054 

 .0020 

 .0055 

 .0009 

 .0035 

 .0035 

 .0069 

 .0101 

 .0063 

 .0051 

 .0010 

 .0035 

 .0050 

 .0008 

 .0017 

 .0010 

 .0037 

 .0020 

 .0019 

 .0024 

 .0011 

 .0018 

 .0036 

 .0017 

 order 



