32 HYDRAULICS. 



upon which this machine, in a great application of Water to the driving of 



measure, depends for its action. Bar- machinery is so simple, so cheap, so 



ker's mill is a machine which is very constant, and equable in its action, 



warmly recommended to practice by all that it amply merits the preference con- 



the eminent mechanics who have inves- stantly shown to it whenever it can be 



tigated the subject ; and considering the obtained : but it frequently happens, 



high respectability of their names, and that motion and power are required for 



the simplicity and cheapness of the machinery, w T here the stream may not 



machine, it cannot but be matter of be sufficiently powerful all the year 



surprise that no attempts at its con- round to drive a large wheel ; and in 



struction on a large scale have been that case, two smaller water-wheels 



made in Great Britain, where the are to be preferred to one large one ; 



motive power of water has been more because the one wheel may be driven 



extensively used than in any other part when there is not water enough for 



of the world, and has in no small de- both ; besides which, it affords an op- 



gree contributed to that pre-eminent portunity of repairing one wheel while 



excellence which our country is ac- the other may be at work, and posses- 



knowledged to have obtained in her ses other practical advantages, 

 various manufacturing processes. The 



CHAPTER IV. 



BOOKS UPON THIS BRANCH OF SCIENCE. 



Hydraulics m general. 



THE principal books on these subjects are chiefly by foreign authors, and 

 were, till lately, in foreign languages. Amongst the most conspicuous are : 

 Architecture Hydraulique, par M. Belidor, 4 vols. 4to. Paris, (1782.) 

 Nouvelle Architecture Hydraulique, par M. Prony. Paris, (1796.) 

 Principes d' Hydraulique, par Du Buat, 2 vols. 8vo. Paris, (1786.) 

 Hydro dynamic a, sive de Viribus et Motibus Fluidorum, Commentarii, Dan. 



Bernoulli!. 4to. Strasburg, (1738.) 



Opera Hydraulica de Joh. Bernoulli!, vol. 4. Lausanne, (1742.) 



Traite elementaire d'Hydrodynamique, par Bossut, 2 vols. 8vo. Paris, (1771.) 



Jacob Leupold, Theat. Machinarum hydraulicarum, (1724, 1725.) 



(Among the best English works, and translations on the subjects generally, 

 are) : 



A Treatise of Mechanics, by Olinthus Gregory, LL.D., Prof. Math, in the 

 Roy. Mil. Acad., Woolwich, 2 vols. 8vo. London, (1826.) 



Lectures on Natural Philosophy, by Thomas Young, M. D., 2 vols. 4to. 

 London, (1807.) 



The Works of Vitruvius, translated from Latin, by Newton, 2 vols. fol., 

 (1791.) 



Emerson's Principles of Mechanics, 4to. London, (1758.) 



Ency. Brit., Art. Hydraulics and River. Many valuable detached articles 

 throughout the Trans, of the Society of Arts The Repertory of Arts Nichol- 

 son's Phil. Journal The Philosophical Magazine. 



Particular Subjects. 



Experimental Inquiry on the Power of Mills, by John Smeaton, F. R. S., 1 

 vol. 8vo., London, (1796.) Also, Smeaton's Reports, 3 vols. 4to. (1812.) 



A Treatise on Mills, by John Banks, 1 vol. 8vo., (1815.) also, by the same, 

 on the Power of Barker's Mill, Westgarth's Engine, &c., 1 vol. 8vo., (1803.) 



Practical Essays on Mill-work, by R. Buchanan, 2 vols. 8vo., (1823.) 



Experimental Inquiry concerning the Motion of Fluids, by J. B. Venturi, 

 translated by W. Nicholson, 1 vol. 8vo., London, (1799.) 



A Treatise on Rivers and Torrents, by P. Frisi, translated by Maj. -Gen. John 

 Garstin, \ vol. 4to., London, (1818.) 



