Numerics of the Elements. 547 



Group XV. 

 y=-225-15(-9375)*. 



x. y. y calc. 



Ha ... . ? 225 + 1 ? 



Group XYI. 



' y= 240 -15 ('9375)*, 



x. y. y calc. 



Th . . . . 9 231*61 231-66 



U .... 28 237-64 237*54 



The Specific Values of some Numerics. 



Many of the former values remain practically unchanged. 

 Most of the original memoirs had been consulted, and the 

 necessary calculations made, before the appearance (1903) of 

 the " International Atomic Weights " — the values in which 

 are in several cases nearer than my own to my theoretical 

 figures. Clarke's (1897 and 1902) well-known memoirs* 

 have proved of great service. 



Hydrogen and Oxygen. — By a repetition of old methods, 

 several investigators have found that = 15*88 if H = l. 

 Keiser (1889), however, was the first to utilize hydro- 

 palladium as a source of pure hydrogen, and in a series of 

 very accordant experiments found = 15*95 ; a result not 

 hitherto explained away. Later on (1898), using hydrogen 

 from the same source, in a simpler apparatus, he obtained the 

 number 15*88. 



Attention may be directed to some cross ratios to be found 

 in Clarke's (1897) Memoir, but so far not utilized in this 

 connexion : — 



p. 108 : 



Aii 3AgCl v O, 196*713 v 100 „ 1 f xt O ,-_ 



tt- x a x <tt^ = o — x - , g o^i x > ,>,.-. . * Hence TJ =lo*97 



H 3 Au 3AgCl 3 45*824 8*9614 H 



p. 310 : 



Co 21*367 ^ 58*630 „ 15*90 



Co X H = 78*633 X -T~ ' HenCe H = 1 ' 



pp. 305, 310 : 



Ni 



N H " 78570" 



mit 

 + Stas. 



v Ni 21*430 „ 58*456 „ O 15*94 



x tt = „ n ^„a X — ^ Hence ^r = 



* Smithsonian Miscellaneous Collections, and Am. Chem. Journ. 1902. 



