Stihl ames ae 
Imaginary planet, 
of 1074 Ib. of 
matter, close to 
the Sun, 
Mercury, 
Venus, . 
Earth, 
Mars, 
Jupiter, 
Saturn, 
Uranus, 
Neptune, 
MECHANICAL ENERGIES OF THE SOLAR SYSTEM. 
TABLE IL. 
Potential Energy of gravitation to 
Sun’s surface. 
MECHANICAL ENERGIES of the SOLAR SYSTEM. 
73 
Actual Energy relatively to Sun’s centre. 
In foot-pounds. 
57 x 10% 
697 x 10% 
790 x 10% 
105 x 10% 
268,800 x 103 
80,440 x 10% 
13,430 x 10% 
Equivalent to supply of 
Solar Heat, at the present 
rate of radiation for a 
period of 
6 yrs. 214 days 
3 wae 997 see 
. 303 wee 
. 952 see 
In foot-pounds. 
967,000 x 10° 
333 x 10” 
347 x 10” 
2,952 x 10% 
1,843 x 10% 
160 x 10” 
119,980 x 10” 
19,580 x 10% 
1,625 x 10% 
1,217 x 10” 
Equivalent to supply 
of Solar Heat, at the 
present rate of 
radiation for a period of 
116 yrs. 6 days. 
1:44 eee 
15-2 
98°5 
80:7 
7-0 
14 yrs. 144 
2-197 
71-2 
53:3 
15,750 x 10® 
To the Harth’s surface. Relatively to Earth’s centre. 
Moon, . . . 
Earth (rotation), 
2,846 x 1027 3-0 hours 1:48 minutes 
9:03 
2,347 x 10% 
14,310 x 10 
Total, 380,000 x 10% 45,589 years 1,114,004 x 10 134 years. 
AppITIONS (May 9, 1854), No. I. Conclusion of Physical Astronomy against the Extra- 
planetary Meteoric Theory. 
Meteors which when at great distances possessed, relatively to the centre of 
gravity of the solar system, velocities not incomparably smaller than the velo- 
city due to gravitation to the Sun’s surface, must strike the surfaces of the 
earth and of the other planets not incomparably less frequently than equal areas 
of the Sun’s surface, and with not incomparably smaller velocities, and conse- 
quently must generate heat at the surfaces of the earth and other planets not in- 
comparably less copiously than at equal areas of the Sun’s surface. But the whole 
heat emitted from any part of the Sun’s surface is incomparably greater than all 
that is generated by meteors on an equal area of the earth’s surface, and there- 
fore is incomparably greater than all that can be generated at his own surface 
by meteors coming in with velocities exceeding considerably the velocity due 
to his attraction from an infinite distance. Hence upon the extra-planetary 
Meteoric Theory of Solar Heat the quantity of matter required to fall in cannot 
be much, if at all, less than that required upon the hypothesis that the work done 
by the Sun’s attraction is equal to the mechanical value of the heat emitted from 
his surface, and must therefore be, as found above, about -000060 of a pound per 
_ Square foot per second, or 1900 lb. per square foot in a year. The mean density 
