XI. TIME. 99 



469. Ordinary Marine Chronometer Compensation 

 Balance. The British Horological Institute. 



470. Models (twelve) of Compensation Balances, show- 

 ing various attempts to overcome what is known as the " Error " 

 of the ordinary Compensation Balance. 



The British Horological Institute. 



471. Models (ten) of Compensation Balances, showing 

 various attempts to overcome what is known as the " Error " of the 

 ordinary Compensation Balance, by the late Thomas Hewitt. 



The British Horological Institute. 



472. Marine Chronometer by Earnshaw. 



The British Horological Institute. 



473. Marine Chronometer with Midge's Escapement. 



The British Horological Institute. 



474. Grossmann's Micrometer. 



The British Horological Institute. 



475. Model of " Ferguson's Paradox." 



The British Horological Institute. 



476. Model of Cole's Resilient Escapement. 



The British Horological Institute. 



477. Callipering Engine, by the late Richard Roberts. 



The British Horological Institute. 



478. Models of English and French Repeating Motions 

 for Watches. The British Horological Institute. 



479. Watch Movement. 



The British Horological Institute. 



480. Marine Chronometer Movement. 



The British Horological Institute. 



481. Collection of Watch and Chronometer Balance 

 Springs. The British Horological Institute. 



482. Map showing allowance of time to be made for velocity 

 of sound as applied to the Westminster Clock Bell. 



The British Horological Institute. 



483. Universal Dial, made in 1616 for Prince Charles. 



The Royal United Service Institution. 



Presented to the United Service Museum, in 1832, by Captain W. H. 

 Smyth, K.N.,K.F.M., F.K.S., &c., &c. 



484. Timekeeper, which was twice carried out by Captain 

 Cook. The Royal United Service Institution. 



G 2 



