244 CATALOGUE. — APPLICATION OF HYDRAULIC FORCES, SEAMANSHIP. 



Bazin on swimming. Hamb. Mag. I, III. 



and XXI. 

 Robertson on the specific gravity of men. Ph. 



tr. 1757. 30. 

 Gelacy's jacket for supporting men. A. P. 



1757. H. 179. 

 Franklin's works. Letter 55. 

 Wilkinson on the buoyancy of cork. Ph. tr. 



1765. 95. 

 La Chapelle's scaphander, or swimming dress. 



A. P. 1765. H. 139. 

 Thevaiot Art de nager. Par. 1781. 

 Diving. E. M. A. VI. Art. Plongeur. Art. 



Nacre. 

 Bernardi Arte ragionata del noto. 2 v. 4. 



Napl. 1794. R. S. 

 Klingert on a new diving machine. Ph. M. 



III. 59. 

 Spencer's marine spencer. Ph. M. XVI. 



172. 

 Lawson on saving lives. Ph. M. XX. 362. 



By means of a common hat tied up in a handkerchief. 



Instruments subservient to Sea- 

 manship. 



Measuring a Ship's way. 



Hooke's waywiser for a ship. Birch. IV. 230. 



Revolving. 

 Pourchefs watch. Mach. A. III. 203. 

 Saumarez's marine surveyor. Ph. tr. 1725. 

 XXXIII. 411. 



A revolving Y fixed to a rope as an axis, and making a 

 turn in eveiy ten feet. 



Saumarez's further account of his marine 

 surveyor. Ph. tr, 1729- 45. 



Substitutes sometimes a wheel with oblique fioatboards 

 jor the fly or Y. The fly revolved somewhat oftener in a 

 given space as the motion was more rapid. 



Dubuisson's machine. Mach. A. VI. 87. 

 Boiiguer's log. A. P. 1747- 6-14. H. 96. 



Bouguer on the corrections of the pilots. A. 



P. 1752. 1. H. 125. 

 Poleni. A. P. Pr. II. viii. 

 Smeaton's experiments on measuring a ship's 



way. Ph. tr. 1754. 532. 



By a revolving plate. 

 Hopjiinson's machines. Am.tr. II. 159- III- 



239. Repert. I. 49. Papers on nav. arch. 



II. i. 33. 



One by the inclination of an oar, the other by a tube 

 with oil. 

 Cooke's instrument with a spring. Ir. tr. 1789. 



in. 117. Nich.V. 265. Ph. M. XII. 31 1. 

 Gould's patent logs, with wheelwork. Rep. 



XIII. 225. XV. 227. 

 Hamilton's substitute for a log. Papers on 



nav. arch. Repert. ii. I. 355. 



A reservoir with an orifice constantly discharging. 



See hydrodynamic measures. 



Sounding. 



Hooke's sounding instrument. Birch. I. 307. 



III. 397. 



With an apparatus for bringing up water. 

 Cook's machine for sounding the sea. Ph. tr. 

 1746. XLIV. 146. 



By observing the time of its descent and ascent. 

 Charnock's sea gage. Repert. II. 180. 



With a fly and wheelwork. 



Ph. M. XI. 359. 



Humbolt has observed that the sea is colder near shallows. 

 Massey's patent for sounding at sea. Repert. 

 ii. III. 171. 



With rotatory motion. 



See measuring instruments. 



Measures of the Wind. 



D'ons en Bray's machine for showing the di- 

 rection of the wind at sen. A. P. 1731. 236. 



Bouvet's machine for measuring the force of 

 the wind at sea. Mach. A. VI. 153. 



See meteorological instruments. 



