turns the pinion g, which leads the hour wheel V. The leaves and teeth of 

 these pinions and wheels are proportioned, as already explained, so that the 

 wheel V revolves once during twelve revolutions of the wheel M. The hour- 

 hand, therefore, which is carried by the tubular axle of the wheel V, moves 

 once round the dial in twelve hours. 



Our object here has not been to give a detailed account of watch and clock 

 work. Such a general account has only been attempted as may explain how 

 tooth-and-pinion work may be applied to regulate motion. 



