ISSO.] 



107 



[Sheafer. 



cent particles, do not acquire the oscillatory velocity of light until y^ 

 has acted for i the time of rotation. Does this indicate successive vibra- 

 tions in the directions of three co-ordinate axes ? And does the tidal action 

 of the planets contribute to the disturbance from which the vibrations 

 originate? The sun-spot theoi-y, and equations 25, 26, and 27, favor 

 such a hypothesis. The proportionality indicated by (1,) 



M : «! : : ^1 <i2 : 2 TT r, 

 becomes signiJicant, if vre consider that any equatorial particle must 

 move through the distance 2 tt ^j before it returns to the same relative 

 position, and that during the entire series of disturbances, through which 

 it passes in the interval, g^ is exerting an energy, the resultant of which 

 is eqviivalent to a fall of g^ ty^. 



BORING RECORDS FROM THE ANTHRACITE BASIN. 

 By Mr. P. W. Sheafer. 



Record of Lower Boring. N'assau Shaft. One mile north of Scranton. 



128' 7" 



