ON A NEW ASTRONOMICAL 

 CLOCK 



[Being a Paper read before the Royal Society -, 

 June 10, 1869.] 



IT seems strange that the dead-beat escapement 

 should still hold its place in the astronomical clock, 

 when its geometrical transformation, the cylinder 

 escapement of the same inventor, Graham, only 

 survives in Geneva watches of the cheaper class. 

 For better portable time-keepers, it has been altered 

 (through the rack-and-pinion movement) into the 

 detached lever, which has proved much more 

 accurate. If it is possible to make astronomical 

 clocks go better than at present by merely giving 

 them a better escapement, it seems almost certain 

 that one on the same principle as the detached 

 lever, or as the ship-chronometer escapement, would 

 improve their time-keeping. 



C C 2 



