i4 



List of New Publications. 



[Aug. I, 



after tlie fwcep has patTed at or near the 

 place of cuntaft between the eccentric 

 and tlie inner barrel, the pollerior fpacu 

 ■will be fiiildenly dimiiiilhed by the repa- 

 ration of all that portion thereof which 

 tvas comprehended between the. cccen- 

 tiic and the inner barrel, in confequeuce 

 or by reafon of the laid place of contact 

 fcaviiii: come to be beiiind the fweep ; and 

 the faid portions fo fcparated will in each 

 cafe refpe6Hvely become portions of the 

 anterior fpaces, in confcquence or by rea- 

 fon of the intenal or diftance which w ill 

 at the fame time be fornicd or made be- 

 tween the eccentric and the barrel imme- 

 diately before the fweep. Whence it is 

 manifeft, that if any fluid be forced by 

 gi-avity, elafticity, ororherwife, throui^h 

 one or more apertures from without into 

 the fpacc on one fide of the fweep, that 

 prefiure will carry the fwcep forward and 

 the eccentric along with it, together \nth 

 fuch barrel or barrels as by the coiiftriic- 

 tion as aforefaid Ihall or may be fixed to 

 the fwcep ; and moreover, if there be 

 any one or more apertures communica- 

 tlngfrom the (jppofite fide of the fweep, 

 in order to allow the faid thiid to efcape, 

 or be carried otf, or condenfed, or other- 



wife difpofed of, all fucli portions of die 

 faid fluid as by tlie changes of fifuation of 

 the fweep hercinbclorc defcribed fliall be 

 feparated from occupying part of the 

 fpace behind the A\ce|>, and fhall come 

 to occupy part of the fpace before the 

 fame, will in fact fo efcape, or be carriiul 

 off, or condenfed, or difpofed of, and the 

 rotary motion of the engine will be ke|)t 

 up, and may be applied as a firft mover 

 to other works, fo loni; as a due fupply of 

 the faid fluid fliall he alforded. 



This engine is intended to be conneft- 

 ed with other works, in order to drive the 

 fame as a (irft mover, fo as to work mills, 

 veffels, Ike, or deepen liarbours, giving 

 motion to carriages, &c. When it is em- 

 ployed to raife or give motion to any fluid, 

 the eftetts produced will be the fame as 

 thofe of pumps, fire-engines, forge-bel- 

 lows, ventilators, ike. 



The patentee prefers circular barrels ; 

 but other figures, as the f;Tjflrums of 

 cones, &c., may be made ufe of. He 

 likewife adds, that the materials muft be 

 taken according to the intended ufcs, and 

 the judii^ment of the engineer, who may 

 ufe metal, wood, paper, leather, glafs, 

 pottery, or any other fit fubftiince. 



LIST OF NEW PUBLICATIONS IN JULY. 



S^ As the Lift of Nero Pnl/liaitioiis, cciitaintd in the. Monthlt/ Magazine, is the 

 ONLY COMPLETE LLST PUBLISHED, and tonfaimntly the oiili/ one 

 that can be vfiful to the Public for Pitrpqfia of gtneral lic/'crence, it is reqtiejlcd, 

 that Authors and Pnhlijhirs uill continue to comitiuniculc Notices of their Works 

 (Pojipaid), and thei/ zcill always be f nit hfully infer ted, FREE of EXPENCE. 



of feveral moft eminent Perfons of tlie 

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Memoirs ot' the late Rev. Jofeph Warton, 

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 Ills Works, and a literary Correfpondence 

 between eminent Perfons, rel'crved bv liim 

 for Publication ; by the Rev. John Wool, 

 A. M. 4I0. 27s. bds. 



ARCIIITrCTURE. 



CPFCIMENS of Continental Architeaure ; 

 ^ by KobcrtSmirke, .Tnn. F. R S. Part I. 

 jl. los. to be continued in four parts. 



Architertural Antiquities of Great Britain, 

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 cient edilices, with hiftorical and dufcriptive 

 accounts of each, by John Briltou, medium 

 4to. 5^3. 6d. 



BIOCnAl'HY. 



Thft excjnplary Life o*' the pious Lady 

 Guion ; tranllalcd from her own account in 

 the orighial French, by J. IX Brooks. 7s. 



A.'-ketch of the profL-lhonal Life and Cha- 

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An Account of the Life and Writings of 

 James Beatlie, l.L.U. ; by Sir W. Forbes, 

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Memuita ef M(s, Cioucli ; with Anecdotes 



The Theory of Dramatic Repreleutalion 

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Demctriui, the Importer ; a tragedy, from 

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plaufe 



