Laws of Molecular Force. 37 



Table XXIX. [continued). 



Third family and Gallium subfamily. 



Al. La. Ga. In. Tl. 



T 1123 710 303 449 563 



M/p 106 22-3 11-7 153 181 



M.H 11-9 235 41 8-8 14*3 



(M/p)/MH ... -9 -95 2-8 175 T25 



Fourth family and Tin subfamily. 



Oe. Sn. Pb. 



T 1000 503 599 



M/p 21-0 16-1 18-1 



M 2 l 27*9 109 15-3 



(M/p)/MH -75 1-5 1-2 



Fifth family and Arsenic subfamily. 



P. Di. As. Sb. Bi. 



T 420 (mean) 1200 773 710 540 



M/p 13-5 223 13-2 17*9 211 



M 2 l 5-8 357 12-2 16-4 161 



(M/p)/M 2 Z 2-3 -62 11 11 1-3 



Sixth family. 



S. Se. Te. 



T 388 490 728 



M/p 15-7 171 202 



M.H 6-3 10-0 190 



(M/p)/M 2 l 2-5 1-7 1-06 



Seventh family. 



01. Br. I. 



T 198 266 387 



M/3 17 22 25-6 



Wl 3-5 7*0 129 



(M/3)/M 2 Z 49 31 2-0 



Eighth family — Iron, Palladium, and Platinum groups. 

 Fe (Ni Co). Pd (Eu Eh). Pt (Os Ir). 



T 2080 1775 2050 



M/p 7-2 9-2 91 



M.H 16-9 206 261 



(M/p)/M 2 J -42 -45 -35 



The first point of importance brought out by this table is 

 that in the main families the ratio (M/p)/M. 2 l has a constant 

 value characteristic of each family, and in the subfamilies a 



