Manchester Mejnoirs, Vol. xlviii. (1903), No. 1. 3 



By multiplying in like manner the atomic weight of 

 the second member of H3n (Al = 27), the products, minus 

 the atomic weight of the first member (C=I2), are the 

 atomic weights of the members of this series. 



Hsn. 



. O . I2 = C = 12 



1 X 27 . 0= Al = 27 



2 X 27— 12 = Sc = 42 



3 X 27 — 12 = Ce = 69 

 4X 27— i2 = Ga = 96 

 5 X 27— 12 = Yt =123 

 6x27— I2=ln =150 

 7 X 27— i2 = Er = 177 

 8x27— 12 = Tl =204 

 9X 27— i2 = Th =231 



The members of the series H7n in my Table of 

 Elements, arranged with their atomic weights in multiple 

 proportions, now stand in the following order : — 



H7n. 



Ne= ixH7= 7 



N = 2 X H7= 14 



Ar = 3xH7= 21 



Kr= 6xH7= 42 



Xe= 9xH7= 63 



Si = 4xH7= 28or5xH7 = 35* 



Fe = 8xH7= 56 Mn 55 . Ni 58 .Co 58 



Pd = 15 X H7= 105 . Pd 105-6 . Rh 104-4 • Ru 104-4 • Da . 



y\u = 28x H7= 196 . Pt 197 . Ir 198 . Os 198 



The position of carbon in the series H3n is confirmed 

 by its exact numerical relations with aluminium, thallium 

 and thorium, and the multiple proportions of the 



• Regnault, Annales de Chiviie et de Physique, Tome 63, pp. 24-31, 

 1861. 



