i 'has,-.] 



428 



[Jan. 2, 



The influence of luminous undulation is also shown by the principal 

 planet of the light belt (Jupiter), which is also the controlling planet of 

 the system. For the time required by light, to traverse the linear orbit 

 (4p 5 ) which would be synchronous with Jupiter's orbit, is equivalent to 



the time of satellite revolution at Jupiter's surface 



(n!) 



4 x 5.2028 X 497.829 = 

 1 = /10360V = 1.0642 



10360.24 = 2-. ''■ 



VI 0043/ 



Li = (1047.875 

 r- 



g JL = 1047.875 -h (9.9485)'- 

 9h 



1.0642 1 3 = 9.9485 



10.581 



= 11.80 x 365.256 X 24* -*- 9 55 m 26 s . 5* = 10477.56. 



= (10.587 x 9.94S5) 2 X 688.84 = 7009.5 



^L = 24 ,l ~9' ! 55 m 26 8 .5 



(10477.56) 2 = 



1047^88 

 70(50.5- 



X 



137718750 



Ct)' 



.(10.) 



2.4183. 

 Substituting in (2); (5.2028 X 214.54) 3 



V.2.4183/ % r 



1 3 '3 



Multiplying by -9- = 9.9485, and reducing 



r 5 



/>„ = 108.33;-.. = 429,300 miles. 

 p 3 = 214 54,o = 92,100,000 miles. 

 v — .43096," = 185,000 miles. 



The experiments which are now in progress, for measuring the velocity 

 of light, may lend interest to the following comparative tabulation, in kilo- 

 meters, of some of the most important approximations to the velocity. 

 P,y Measurement. 

 Maxwell (Electricity), 288,000 kil. 



Anion and Perry " 298,000 " 



Foucault, 298,360 " 



Michelson, 299,820 " 



'Cornu, 300,000 " 



By the Nebular Hypothesis. 

 From Kirkwood's Analogy, (4) 297,254 kil. 



(7) 297,672 " 

 " Jupiter's density, (10)297,720 " 



" Earth's mean perihelion (6)298,182 " 

 '* Primitive condensation (9)299,088 " 



*This is the I Lme of Jupiter's rotation, as given by Professor Asaph Hall. 



