108 * M. C. Lea on Numerical Relations existing 
equality or simple relation of atomic volume, we cannot 
that their elementary nature has been absolutely established. _ 
The following substances combine relations of chemical equiv: 
alents already pointed out, with analogies of atomic volume: 
Differences of Atomic} Relation of 
i volume. At. vol. . 
ss Nitrogen, °° 44 = 8 
ase 4 
Phosphorus (vapor),  - P01 sence 
a4 i 
Arsenic (vapor), - —- 207 3 os 
Lead, ON ae 909 - 1 
44°5* a : 
~¢ Tin, <2 ee s09 - 1 4 
45* - eee 
Nitrogen, bat 
45; 
Phosphorus, - “ 17-7 - oe 
44 
Arsenio, © 3 LO pepe sg 
453 4 
877 | Antimony, - “ lifes ss 29 
or twice 43°85 Bismuth, = . 2 e118 : 
(Where phosphorus, arsenic, &¢., are compared in 
state, the unit of relation is of course different). It has 
a In the cases of nitrogen, tin and lead, the equivalents are taken with a negativ® : 
sign, as before explained. : 4 pec ; 
_ + The numbers here given for the atomic volumes are calculated from ype mit 
u 
gravities adopted in Gmelin’ and the la: d + reliable 
ations of cheniiedl ok ee if ese 
