406 J. P. Cooke on the Chemical Relations, Sc. 
KO, ROs, where R is any member of the Six Series after oxy- 
gen, and whose atomic weight, therefore, equals 84+n6. ‘The 
atomic weight of KO, ROs must'be necessarily 39°5+48+(8+76), 
or 95:°5+n6. As this symbol differs from that of the Six Series 
only in the nucleus, the atomic weights of the salts which are 
represented by it must progress by the same differences as those 
of the corresponding elements. 
The properties of these series of homologous compounds will 
also be found to vary in a regular manner, and the law of the 
progression of the specific gravities in the gaseous state can 
easily expressed algebraically, since in each series the quotient of 
the specific gravity divided by the atomic weight is a constant 
quantity. As an illustration, we may take the series of binaries 
homologues of water given in the Nine Series of our table. 
follows from what has been said, that the atomic weights of 
these compounds equals 9+”9. With each as = 3, therefore 
Sp. Gr.=4-5+74:5. We give below a table of the observed or 
calculated specific gravities, not only of these compounds, but 
also of those homologues of NHs whose specific gravity has 
been observed. 
(| HOMOLOGUES OF WATER. | HOMOLOGUES OF AMMONIA GAS. | 
Sp.Gr p. Gre. 
auw. ape 8 peng + 
Sp. Gr. = 45 + n4'5. pee Sp. Gr. = 55 + pce ee 
ie e ! aE TIES. 
Symbols. SPECIFIC GRAVITIES. Symbols. |, Seer, Coe 
Theoret. Observed. | Theoret. __Observed. 
HO 45 9 NH; 8-5 85 
HY. 9 PH, rea Ve 175 
HCl 135 135 An, | Se 38°5 
HBr 405 39°5 | ; 
HI 63 635 anes 
ven, 
we shall be able to calculate, nay, predict, its properties with ab- 
solute certainty ; and when our chemical treatises shall have been 
ina few 
will 
be realized, for the problem of the transmutation of the e 
will have been theoretically, if not practically, solved. 
