258 



List of New Publications. 



[Oct. 1, 



power which turns a reciprocating axis from an axis, and aided by a pendulum, 

 between two or more arms interiecting The motion of the fliafts in one uniform 

 that axis, and communicating their nio- dircttion either way is prelcrvcd by 

 tion to corrcfponding cranks, wheels, or means of proper ratchet wheels and 

 other fuitable contrivances, for the pur- catches: horizontal wheels are to be pre- 

 pofe of uniting to work one and the fame ferred when the fliaft is vertical. The 

 ' ihaft : the arms by this combined procefs machines may be v\ orked in any pofi- 

 ti-anfmitting to the ihiift the power im- tion, upright or reverfed, or laid lateral- 

 prefl'cd on them ; for the aftion of each ly, with little or no alteration of their re- 

 arm aflifts that of the reft ; and, if the lative parts ; the ratchet wheels muft be 

 power be equally divided between the fuited to the change of pofition : the re- 

 two anus, the action of the one exaflly lative fituation of the different parts of 

 balances that of the other. Machines the machine may be varioully changed, 

 made according to this invention may be and the power transferred in any dircc- 

 ronfiderably varied in their ftrufture, tion. The power may alfo be divided 

 may be made of any fi7e, and worked by varioufly, audits balance i till preferved, 

 any power capable of giving futticient im- entirely or partially, as the cale may re- 

 pulfe to the axis, or different machines quire. If it be originally by alteration 

 may be impelled by different forces, and on two oppofite arms, turning on one 

 maybemade to aft at right-angles to each axis, it will ad with the greatell advan- 

 otlier, or otherwife, fo as to combine in tage. Machines conftructed on this plan 

 one common operatibn. " Small machines are liable to a very fmall degree ol trie- 

 may be worked by a handle fufpended tion. 



'N. B. Communications of Patentees, are purticularlif-jequejled. 



LIST OF NEW PUBLICATIONS IN SEPTEMBER. 



As the Lift of New PuHications, ronlained in the Mant/ili/ Magazine, is 

 NLY COMPLETE LIST PLBLTSHED, and confequcntly the only 



the 

 ONLY COMPLETE LIST PUBLISHED, and confequcntlylhe only one 

 iht;t can be ufefid to the Public for Purpofes of «eneral Reference, it is reqvejlcd, 

 that Atilhors and Publl/hers zcill continue to communicate Notices of their Works 

 (Pojlpaid), and they uill alicays be faithfully infcrted, FREE of EXPENCE. 



ASTRONOMV. 



'FHE Aftrarium improved, or Views of the 

 principal Fixed Stars and Conftellal ions, 

 prefented on Twelve Plates, (one for each 

 Month in the Year,) from which their 

 Names and relative Situations may be 

 knoivn by fimple InfpeClion. 



BIOCKJIPHV. 



Memoirs of the Lite ot the Right Honour- 

 able Charles James Fox. 'is 6d. 



The Life of Dr. Prieftley, by bis Son, and 

 an Accoimt of liis Writings and Opinions, 

 by Mr. T. Cooper, 8vo. 9s. 



DRAMA. 



Sultana, or the Jealous Queen, a Trage- 

 dy J by William Gardiner. 



EDTJCATION, 



Corapofition, or Ten Minutes Advice to 

 Young Perfons imperfeftly educated, and 

 to Foreigners partially coLverlant with the 

 Englilh Language.; with Seleftions from 

 Grammar, and Notes explanatory ) by a 

 Man of the World. Is. 6d. 



Leftures on Natural Philofopby, the Re- 

 fuit of manj Yean' praflical Experience of 



the Fsdls elucidated ; with an Appendix, 

 containing a Variety of Aftronoinical and 

 Geographical Problems j alfo forae ufeful 

 Tables, and a comprehenfi e Vocabulary ; 

 by Margaret Bryan. 4to., 'i guineas. 



The Geographical Selector ; confifting of 

 Maps, Charts, and Plani, of the principal 

 Cities, Harbours, Forts, &c., in the 

 World ; accompanied by lliftorical and To- 

 pographical Uiulirations No. L, 4to., 

 3s. 6d., to be completed in 36 Numbers. 



Recreations in Englilh and French ; like- 

 wife EngliQi and Geruian ; by Dr. Render. 

 To be had feparate, either Englifh and 

 French, price 6s. boards ; or Englilh and 

 German, price 7s. boards. 



HISTORY. 



An Abridgment of the Hiftory of New- 

 F.npland, for the Ufe of Young Perfons ; 

 by Hannah Adams. 12mo., 3s. neatly half- 

 bound. 



lAW. 



A Report of the Trial of Mr. J. Kelly, 

 Paymailer of the 32d Regiment of Foot, 

 fof the Murder of Captain W. Ilarrifon, of 



ttie 



