Se ee ee 
P. E. Chase— Velocity of Primitive Undulation. 369 
ity, to undulations near the hottest portion of the solar spec- 
trum,* and indicate a possible complete identification of the sun’s 
attractive and thermo-dynamic energies. 
According to Struve’s constant of aberration, vy (the velocity 
: 497°85 : 
of light) =the =°4316r, per second. The corresponding 
value of n?=486-7, and the number of vibrations per second 
all the gravitating motions of the solar system, 7s almost, if not 
exactly, vdentical with the velocity of light, the several approxi- 
mate values be:ng, in units of light-velocity, 
According to Spérer, 969 
‘ “ Carrington, "983 
. “ Faye, "987 
. * Herschel, ‘997 
Light, 1-000 
These values exhibit a discrepancy, varying between 4 of one 
per cent (H.) and 3:1 per cent (8.). If this close accordance is 
significant of actual physical influence, there are various uncer- 
tainties of observation, in the e.ements of the calculation, 
which might account for a still greater discrepancy. Perhaps 
the most important is the uncertainty as to the proper allowance 
for the differences in the angular velocity of sun-spots in dif- 
ferent latitudes. If there were no resistance to the revolution 
of the spots, their velocity should be planetary, and therefore 
far greater than it actually is. On the other hand, if they were 
rigidly imbedded in a rotating mass, their angular velocity 
should be uniform. The differences are such as to meen the 
partly 
tion : 
The three following additional relationships may, perhaps, 
prove to be something more than merely curious. 
* If the identification is exact, the actual number of oscillations per second is 
457 (10); the number in the extreme red ray being 440 (10) if we estimate 
Sun’s mean distance at 92,000,000 miles. 
