238 CATALOGUE. — APPLICATION OF HYDRAULIC FORCES, AIR OR WIND. 



The velocity of a cotton mill was found to be as the water 

 expended ; the effect being as the square of either. Y. 



liuchanau's breast wheel. Ph. M. XI. 79- 



West's pump turned by a spiral pipe. Ph. M. 

 XI. 16(). 



Sargeant's machine for raising water by a re- 

 servoir as a moving power. S. A. XIX. GGO. 

 Ph. M. XII. 14. Nich. 8. II. 60. Repcit. 

 ii.I. 109. 



Besant's undershot waterwheel. S. A. XIX. 

 274. Ph. M. XIII. 22. Nich. 8. III. 49. 

 Repert. ii. I. 40. Gilb. XV. 194. 



Intended for diminishing the resistance of the water in 

 running off. 



Johnson's patent for a perpetual motion. Re- 

 pert. XIV. 73. 



By a tide wheel. 



Close's apparatus worked by a siphon. Nich. 



8. I. 27. 

 Trevithick's acting pump. Nich 8. I. I6.I. 

 Norton's patent watermill. Repert. ii. III. 



327. 



A spiral wheel. 



On Barker's rotatory mill, on Westgarth's 

 machine, and on horizontal waterwheels. 

 Banks on machines.. 1, 20, 38. 



Robison says, that there is no limit to tlie advantage de- 

 rived from a slow motion in an overshot wheel. But the 

 advantage is in fact trifling, within any moderate limits. 



Waterwheels are sometimes made of cast iron. 



The Dutch camels are machines for raisinj weights by the 

 buoj-an^ power of water. 



Some authors make the force of water as the quantity and 

 the iquare of the velocity conjointly ; this is true of the me- 

 chanical power, which is proportionate to the product of 

 the quantity and the height, but not of the immediate force. 



In the Mathematical Elements, Art. sg3, p. 62 of this 

 volume, the word effect is used in too vague a sense : the 

 whole article must be considered only as a part of the fol- 

 lowing. 



See hydraulic machines. 



Air or Wind. 

 Stiiling carriages. Wilkins's mathematical 

 magic. 



Hooke on the sails of mills and ships. Hooke. 

 Ph.Coll. n. 3, 61. 



Describes a horizontal windmill in which the sails are 

 moved by machinery during each revolution into the best 

 possible condition ; but does not approve it. 



Lahire on wind mills. A. P. IX. 96. 



fOn the position of the a.tis of a windmill 



with respect to the wind. A. P. 1701. H. 



138. 

 Couplet's horizontal mill. Mach. A. I. 105. 

 Duquet's horizontal mill. Mach. A. I. 107. 

 Windmills. Leiip.Th.M. G. 

 Self regulating windmilL.Leup. Th. Hydraul. 



2. t. 32. 

 GUillbn's horizontal mill. Mach. A. VI. 75. 

 Du Bost's horizontal windmill. Mach. A. 



VII. 117. 

 Euler on windmills. N. C. Petr. VI. 41. 



Makes the best angle about 63° 26', for a moderate ve- 

 locity. 



Euler on windmills. A. Berl. 1756. l65. 

 Belidor Arch. Hydr. II. i. 30. 

 Windmills. Emers. mech, f. 203, 266. 

 Sailing chariots. Emers. mech. f. 213, 214j 



234. 



A horizontal windmill, from Wilkins, of which the sails 

 unfurl when the wind acts on their concave side. 



*Smeatoii on the poweis of wind and water. 



Ph. tr. 1759. 100. 

 Bourrier's horizontal mill. A. P. 1762. II. 



190. 

 Maizi^res's windmill. A. P. I767. H. 185. 

 Maizi^res's horizontal windmill. Roz. Ihtr. I. 



306. 

 Gilpin's horizontal windmill. Am. tr. I. 405. 

 Windmills described. Bailey's mach. I. 180. 

 Verrier's windmill with eight sails. Bailey's 



mach. II. 47. 



Four of the sails are turned according to the strength of 

 the wind. 



Coulomb on windmills, and the figure of 



their sails. A. P. 1781. 65. H. 41. 



