292 
1872.] beni [Chase. 
in the unstable equilibria of organic life, for which I have been able to 
find any recorded experimental value. In all cases which have been tested 
by more than one observer, the kinetic ratios represent the mean of all 
the latest and most authentic results. For convenience of expression, I 
employ the following symbols : 
d=length of terrestrial day. 
y’=duration of orbital revolution of the earth. 
me “« the moon. 
y= 6“ 6c“ 
Y= oe a 3 “a hypothetical satellite at the sur- 
face of the earth. 
9=32.0874877 feet. 
-radius of the earth=20, 923, 654 feet. 
ce’, c/’.... Cxyi= combustible (hydrogen, ether, ....carbon). 
~~ ae —nr >+ Pa 45 
La(77-+++7xvi =product of combustion. 
ty (t/, ’....txyi >=thermal units, or number of pounds of water heated 
1° C. by the combustion of 1 pound of ¢7, 
J—=Joule’s equivalent, ;1°,%, mile 
pounds. 
weight of 72+ weight of cy. 
74—mean height at which the earth is suspended under the centrifugal 
force of the sun. 
Wo Ne se moon ‘‘ ne centrifugal force of 
the earth. 
Ay—=mean height at which 7; would be suspended, in the oscillation 
maintained by combustion and gravitation=J><ty+ 2w,z. 
y -hy—=ly, approximation to solar mass in units of earth’s mass, 
furnished by cy. 
kg—kinetic ratio of eg—=4—l" 
/Pa=ratio of experimental to theoretical value of i. 
m!, m!', m'''==mass of sun, earth, moon. 
Ca Symbol. ye ky pa Authorities * 
1 Hydrogen H HO 1.000 1.000 D, H, G, F&S, A 
2 Ether C,H,O 4CO,,5HO 1.494 1.004 D., F&S. 
3 Olive Oil C,)H,0. 10CO,8HO. 1.495 1.004 D. 
4 Terebene Oe 10CO,,8HO 1.508 1.010 F&S. 
5 Marsh Gas CH, CO,,2HO 1.518 1.020 D., G., A., F&S. 
6 Amylic Ether. C,,H,O 10C0O,,11HO 1.521 1.022 F&S. 
7 Phosphorus ee PO; 1.529 1.027 A. 
8 Olefiant Gas CH CO,, HO 1.534 1.080 D., G., F&S., A. 
9 Oil of Turpentine C,H, 5CO,,4HO 1.542 1.086 G., F&S. 
10 Oil of Lemons © jE; 10C0,,8HO 1.545 1.088 F&S. 
1i Fusel Oil C,,H,,0, 10C0,,12HO 1.596 1.072 F&S. 
*A., Andrews. D., Dulong. F&S., Favre and Silbermann. G., Grassi. H., Hess. I 
reject Dalton’s determinations of k,, for camphor (2.808), because in nearly every instance he 
obtained much higher values than any later experimenters. Further experiments with that sub- 
stance (C10HsO, yielding 10C02,8HO) would be interesting, and perhaps suggestive. 
A. P. S.—VOL. XII.—2x 
