XIV CONTENTS. 



CHAPTER XIII. 



ARTS. PAGES 



275 284. Kotation of the Earth, Weight, Acceleration due to Gravity, 



Pendulum 351360 



285289. Kelativity of Force. Universal Gravitation . . . 360366 

 290, 291. Measurement of time. Effect of change of time-measuring 



process 366370 



APPENDIX. 

 292 299. Measurement, Units, and Dimensions .... 371 375 



INDEX '.. . . 377379 





