590 DR MACVICAR ON THE LAW OF VOLUMES OF AERIFORMS 



Let cold be urged so as to reduce the open icosatoms to the more compact 

 dodecatoms. Then, — 



Solid Mercury. G = ^g = l^^^ = 14-8. Exp. 14-4. 



II. Metals. — Molecule the icosahedron without or with the poles marked 



X,„ and X (X,„)X. 



Copper <^)»Cu = 3_2><22^ 3.^ Exp.. 89. 



^ Fe(Fe),„re 28x22 ^„ ^ ^_ 



^'"^ iAQ^=-8r-=^^-^- ^"P-7-^- 



The formulae here, however, are equivocal, because the fine symmetrical com- 

 bination X^2^.^oXj2=:2 X X20X. 



Here, too, they are equivocal, thus (Xj2X2 = 4(X X^2^,X X22X); that is. a 

 combination of dodecatom and icosatom both differentiated. 



But this metal, in our molecular synthesis, comes out as composite. Also 

 some others; the metallic atoms in symmetrical relation, and locked into each 

 other by that structure which renders so many metals in the mass tenacious 

 and ductile. Our synthesis also presents some fine metals, which have not yet 

 been found in the separate state, — as, for instance, one bearing to selenium the 

 same relation that zinc does to sulphur. The metallic molecules are of the j 

 type X X20X, or rather Y X^^Y. 



Cadmium, .... Mg(Za)Mg = 12 + 32 + 12 = Cd 56. 



Tin, Al(Zn) Al = 14 + 32 + 14 = Sn60. 



Lead, Mg(Se)Mg = 12 + 80 + 12=104 Pb. 



Silver, Al (Se) Al = 14 + 80 + 14 = 108 Ag. 



avoiding fractions in atomic weights. 



