106 



KAXSAi^ ACADEMY OF SCIENCE. 



CurUtS oj Shecljlc Gravity. 



( JW(. roYYvaw nutntrals exi)\-es.s. tW tfoltYtcts.) 



The rate of increase in specific gravity in the elements nearest the cul- 

 minating point in the curve of each hecdecade is ^iVz per cent., thus: 



Co (KVIII) 9.00; Rh (Rb VIII) 12.10; (Cs VIII) 16.24; and Ir (Au VIII) 



21.80. Os (AuVII) is 22.40, which is still higher; but the specific gravity of 



