r 



268 THE LEVER AND WHEELWORK. 



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 thnt 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. 





