238 On the Oscillation of the Pendulum. 
influence on chemical philosophy. ‘The atomic theory as at 
pounds, and therefore that it would be premature to dwell on 
these obvious consequences of the principle until it has been sub- 
stantiated by further investigations. In conclusion, { would ex- 
press my obligation to the gentlemen who have assisted me in the 
labor of the investigation which on account of the large number 
of analyses has been very great and could not have been conclu- 
ded so soon had it not been for their great industry and zeal. 
Arr. XXIIL— Demonstration of the Apparent Motion of the 
plane of Oscillation of the Pendulum, due to the Earth’s Ro- 
tation ; by J. G. Barnarp, A.M., Brevet Maj. Engineers U.S.A. 
Let P be the pole of the earth, and C be the central point of a 
dial represented by the circle mnq* over which the pendulum 
swings; the whole projected upon the plane of the equator. 
2. 
LM 
iP 
= af. > i: 
* The dial circle would of course, be pith Sin dh en 
ellipse; but for convenience is represented dah akg 
