S52 



CATALOGUE. —PXEUM ATI C MACHINES. 



and could not continue the exertion long: this raised 6 

 gallons in a minute. Much water was raised with 50 turns, 

 but very little with only 30 turns in a minute. The rope 

 soon decays, especially if it is not made of hair. 

 Sharpies on raising water by the fall of waste 



Water. JSich. VII. 298. 

 A hydraulic machine from Servifere's cabinet. 



Nich. VIII. 35. 



Two pinions fitted tight and revolving within abox. 

 Draining. Dickson's practical agriculture. 



Harriott's patent pump capstan is preferred to Dodgson's 

 patent double headed ship pump. The lever works hori- 

 zontally by means of wheelwork, and this motion is said to 

 be less fatiguing to the men, so that they can work for an 

 hour or more : and a rope may be applied so that any num- 

 ber may work together. The friction is said to be dimi- 

 nished to Jj by applying a guide to the pistons. 



A pump should have a valve near the moveable piston, 

 and another below the level of the water. Robison. 



A bag like a powder puff with valves makes a good sim- 

 ple pump. Robison. 



Quantity of water raised by pumps. See 

 animal force. 



PNEUMATIC MACHINES. 



*Heronis spiritalia. 



Leupold.Th. M. G. 



E. M. PI. VIII. Amusemens de physique. 



Machines simply Pneumatic. 



Bellows, Fans, and other Mecha- 

 nical Ventilators. 



Papin on the Hessian or rotatory bellows. 



Ph. tr. 1705. XXIV. 1990. 

 Knopperf's fan for corn. A. P. 1716. H. 78. 



Mach.A. II. 101, 103. 

 Barrieres's leathern ventilator. A. P. 1723- 



H. 120. Mach. A. IV. 53. 

 Desagulievs's pump ventilator. Ph. tr. 1727- 

 ■ XXXV. 353. 

 Desaguliers on the centrifugal ventilator. Ph. 



tr. 1735. XXXIX. 40. 

 Rayncs's bellows. A. P. 1728. H. 108. 



Terral's bellows for foimderies and forges. 



A. P. 1729. H. 92. Mach. A. V. 41,93. VI. 



121. 

 Farel's mode of working bellows. A. P. 173.'!. 



H.99. 

 Hales on ventilators. 8. 1743. R. I. 2 v. 8. 

 ' Lond. 1758. 

 Hales on ventilation. Ph. tr. 1748. XLV. 



410. 

 Halcs's ventilator. Bailey's mach. I. 170. 

 Ellison the effect of ventilation. Ph.tr. 1751. 



211. 

 A ventilator erected in the Hotel des Inva- 



lides. Much. A. VII. 379. ^ 

 Pommier's ventilator improved after Hales. 



Mach. A. VII. 413. 

 Bellows moved by water. Emers. mech. f. 



240, 241. 

 Smith's bellows. Emers. mech. f. 244. 

 Blowing wheel. Emers. mech. f. 284. 



The Hessian or centrifugal bellows of Papin. 



Gensanne's bellows for ventilating mines. S. 



E. IV. 158. 

 Jars on the circulation of air in mines. A. P. 



1768. 218. H. 18. 

 Bellows. Gauger Mecanique du feu. 

 Munier's winnowing machine. Roz. Introd, 



' n-79. 



De Bory on purifying the air of vessels. A. 

 P. 1780. lll.H, 13. 



Leroi's simple ventilation by windsails. A. P. 

 1780. 598. H. 13. 



Evers's winnowing machine. Bailey's mach. 

 1.51. 



Fitzgerald's ventilator. Bailey's mach. I. 172. 



Hill's ventilator for mercurial vapours. Bai- 

 ley's mach. II. 70. 



Wilson's patent for applying vapours. Rep. 



XII. 1. 



Elastic tubes. 



Fans. E. M. A. II. Art. Eventaillisle. 

 Wooden bellows. E. M. PI. II. PI. 5. 



