CATALOGUE. — THEORY OF HYDRAULICS, HYDRAULIC PRESSURE. 227 



Pendulum for experiments on resistance. 



S'Graves. N. Ph. by Desagul. Ph. tr. 1748. 



332. 

 Krafft on the impulse of a vein of water. C. 



Petr. VIII. 253. XI. 233. 

 Krafft on tables for the motions of projec- 

 tiles. A, Petr. IV. i. 154. ii. 175. 

 Clairaut on the centre of oscillation in re- 

 sisting mediums. A. P. 1738. 159- 

 D'Arcy on the curve of equal pressure in a 



resisting medium. A. P. 1742. H. 56. S. E. 



1.73. 

 St. Jacques de Silvabelle on the solid of least 



resistance. S. E. III. 639- 

 Necker on curves of descent in a resisting 



medium. S. E. IV. 96. 

 D'Alembert's theory of the resistance of 



fluids. 



Ace. A. P. 1753. H. 289. 

 Adami de resistentia corporum in fluidis mo- 



torum. 4. Berl. 1753. 

 Sulzer on the resistance of the air to a mus- 

 ket ball. A. Berl. 1755. 104. 

 Sulzer on the resistance of fluids. A. Berl. 



1761.41. 

 Euler junior on kites. A. Berl. 1756. 322. 

 Emerson on the solid of least resistance. Pap. 



on N. A. II. i. 39. 

 Kites. Emers. mech. f. 209. 

 Robins's gunnery. 

 *Borda on the resistance of fluids. A. P. 



1763. 358. II. 118. 1767. 495. H. 145. 

 *Borda on the curve described by balls. A. P. 



1769. 247. 

 Lambert on the resistance of fluids to pro- 

 jectiles. A. Berl. 1765. 102. 

 Lambert on a balistic scale. A. Berl. 1773. 



34. 

 Lambert on the resistance of pendulums of 



clocks. Berl. Ephem. 1776. 



Lambert on the constitution of fluids. A. 



Berl. 1784. 299- 

 Molinelli on the descent of bodies in water. 



C. Bon. V. i. O. 280. 

 Bossiit E.xperiences sur la resistance des 



fluides. 



Ace. A. P. 1777. H. 61. E.Ktr. Bossut 



Hydrod. 

 Bossut's experiments. A. P. 1778. 353. H. 

 \ 38. 

 Mann's experiments on the resistance in 



shallow canals. Ph.tr. 1779. 629. 

 J. and J. Bernoulli on a balistic machine. A. 



Berl. 1781.347. 

 Komarzewski's curves of projectiles. M. S. 



R. S. 

 E. M. PI. V. Marine, pi. 152, 153. 

 Edgeworth on the resistance of tlie air. Ph. 



tr. 1783. 136. Repert. X. 87. 



A vertical axis was made to revolve with a given velocity, 

 bearing a horizontal arm. Alone, it required a weight of 

 40 ounces. With a parallelogram 9 inches by 4, fixed .to 

 the arm, the longer side being horizontal, 112 ounces ; the 

 shorter horizontal, 121. With a piece of tin 4 inches 

 square, 803:40+40 ounces, with a piece 8 inches square 

 262=40+222, instead of 40+160. The parallelogram 

 being bent into an Mch with a chord of 8 inches, theshorter 

 side being horizontal, the weight required was 128, instead 

 of 121 ; when the chord was only 71 inches, 133 ounces. 

 Hence it is inferred that sails act best when bent. The dif- 

 ference of the effect in different positions must have been 

 derived from the effect of the rotatory motion. 



MarguerieM6m.de I'Acad. Royale de ma- 

 rine. 



Riccati on rectilinear motion towards a cen- 

 tre. C. Bon. VL O. 138. 



Coulomb on the force of torsion. A. P. 1784. 

 229- 



Finds the constant friction of water only 1 grain in 2iS 

 square feet ; from the oscillations of a cylinder sustained 

 by a wire. 



