SMITHSONIAN CONTRI NOTIONS TO KNOWLEDGE. 



240 



PROBLEMS OF ROTARY MOTION 



I'UKSKNTKn BY 



THE GYROSCOPE, 

 THE PRECESSION OF THE EQUINOXES, 



THE PENDULUM. 



BY 



BREVET MA J.-GKN. J. G. BARNARD, 



OOtOWKL Or BXOIVBBBa C. B. A., A.M., LL.D., KKMDKK OF BATIOHAL ACADKMT OP RCIFSCKS. 



[ACCBPTED FOB P U B L 1C A T IO, OCTO BB B, 1871.] 



