CATALOGUE. PHILOSOPHY AND ARTS, PRACTICAL MECHANICS. 193 



Prior's simple striking part. S. A. XXI. 400. 



Nich IX. 92. 

 Massey's clock with a striking part regulated 



by a pendulum. S. A. XXI. 402. Nicli. 



VIII. 162. Ph. M. XVIII. 303. 

 Elliott's simple repeater. S. A. XXII. 319. 



Nich. VII. 157. 



Parts of Timekeepers. 



Maintaining Power. 

 See Machinery. 



Leboii's clock winder. Mach. A. III. 23. 



On making springs. Leup. Th. M. G. t, 69. 



Kratzenstein's thermometrical power for a 

 clock. N. C.Petr.II.221. 



Leplat's mode of winding up clocks by a cur- 

 rent of air. A. P. 1751. H. 171. Mach. A. 

 VII. 401. 



A weight hung on an endless cord. Eniers. 

 mech. f. 230. 



Galloys's machine for winding up continu- 

 ally the weights of a clock. A. P. 1766. H. 

 159. 



Thorowgood on a new watch key. 8. R. S. 



On the maintaining power in clocks and 

 watches. Nich. I. 429. II. 49, 



Fusee. 



Lahire on the fiaiureof fusees. A. P. IX. 102. 

 Varignon on the fusee. A. P. 1702. 192. H. 



122. 

 Leroy on a new situation of the fusee, A. P. 



1763. 420. H. 127. 

 Chains for fusees. E. M. PI. I. Chainetier. 



PI. 2. 



Wheels. 

 See Machinery. 



Ridley's sector and deepening tool, S. A. VI, 

 188. 196. 



Escapements, or Scapements. 



Sully's escapement without friction. Mach. 



A. III. 95. 

 Leroy's and Sully's clock escapement. Mach. 



A. VI. 83. 

 Leroy's escapement of repose for watches. 



A. P. 1742, H. 158. Mach. A. VII. 127- 

 Leroy's detent escapement. Mach.A.VII.385. 



The first detached escapement. 

 Leroy's new dead beat escapement. A. P. 



1748. H, 120. 

 Volet's watch escapement. A. P. 1742. H. 



162. Mach. A. VII. 139- 

 Gourdain's watch escapement. A. P. 1742. 



H. 158, Mach. A. VII. 141. 

 Galonde's clock escapement with rollers. A. 



P. 1742. H. 165. Mach. A. VII. 159- 

 Soumille's crank escapement. Mach. A. VII. 



325. 



For a pendulum of 19 feet, with a weight of 50 pounds. 

 Carou's dead beat escapement, A. P, 1734. 



H. 139- 

 Christin's watch escapement. A. P. 1755. H. 



138. 

 Lagrange on escapements. A. Bed. 1777. 173, 

 Magellan's escapement. Roz. XX. 376. 

 Howell's detached escapement. S. A. X. 



216, 

 Robin's watch escapement. Roz. XLIII.342, 

 Prior's detached escapement, S. A. XVI, 



307. Nich. II. 3G3. 

 Goodrich's crank escapement for clocks, S, 



A. XVII. 333. Nich. III. 342. 

 Reid on escapements. Nich. V. 55. 

 Delafons's watch escapement. S. A. XIX, 



331. Repert. XVI. 241. Nich. 8. I. 251. 



Seems to resemble Mudge's and Haley's : but the locking 

 is said by the inventor to be simpler. 



Breguet's escapements. Montucla and La- 



lande. III.794. 



With a figure. 



VOL. It. 



C C 



