H 



M ^ TO CORRESPOXDEN'I'S. JJU 



t-J The anonjmons Correspondent ulio writes on t!ie subject of a new \^., 



*A Propelling Power, is rtquested to fonvan! his Plan- to t!)e Editor. Ij* 



I'iie Paper on the Ventilation of Coai-AIincs niui the Drawinirs are Jj^ 



preserved for the Author. Although the Lttter transmitting this Coth- li, 



munieation is dated December Inst, it only came to hand late in the f;' 



presfent Month. j}^ 



Some new Coinintinicntions iiave been received respi'cting Mr. FIORS's W, 



"^H Theory- of Vision ; but we cannot devote more of our pages to this con- fi* 



^j» trovers}-. •js' 



In the Press, and in the Montl^ of June will be published, 



ARRINGTON, a" TALE ; and ORMOND, A TALE. In 

 Three Volumes, Duodecimo. 



BY MISS-EDGEWORTH, 

 Author of COMIC DRAMAS, TALES of PASHIONAIiLE LirE'<i 



&c. - , : 



Printed for R. Hunter, Successor to Mr. Jnhn»on ; and Baldwin, Cra- 

 doclc, -and Joy, in Paternoster Row. [ ' 



CATON'S WORK'S A ne>v Edition, Price 3s. 



A POPULAR TREATISE on the PREVENTION and CUP 

 of the DIFFERENT STAGES cf i^STHMA, with new and s.-- 

 • cessful Instriicuniis lor ihe Prevciuion and Treatment of Asthmatic P» 

 mcluding the Theory of Res,piratum, &c. f 



By T. M. CATON, Surgeon, " 

 No." 10, Stanhope- Street, Nsvvcasiie.-Sticet, Strand'; late of the U'ted 

 H<^spiials of St. Thomas and Guy. 



Printed for Messi s. Sherwood and Go. 20, Paternoster Row 



A TREATISE on IND-IGESTION: being an Inquiry inf the Dl^-, 



eases arising and connccved with die Functions c;f the Stomich v.'ulrUe- 

 mark^ on the Liver, and iis InHuerice on -the Gastric Syst'--m to whifU 

 are prefixed some genend Observations or Scrofulous and Cu'intous Dis- . 

 c-4ses. Price !?>'. 



ENGRAVLMGS. 

 Vi.l. XLIII. A Plate to illustrate a New Transit Irtstrument invejilLd 

 by Sir H. C RsGLBrii-:i.n, Bart. — A Platf; to illuJtrate the Use of Air- 

 Vessels in Plants. By Mrs. Ibb£-ison. — A Plate to illustrate M. Sk- 

 MESTiNi's new Apparatus' for producin'^ Oxygen Gas to restore sus- 

 pended Animatioi^ — Mr. RrAnn/s Paper on the Refraction of the Solar 

 Rays — and Mr. Harcreavks's Observationj on Colours. — A Plate ro 

 illustrate M". J. WHrTFOts.D'i mechanical Substitute for Leeclies; and Mr, 

 J. T:i.LEv's Hydro-pneumat-c Blow-pipe. — A Pla'.e to describe Mrw 

 R. Hughes's Gudgeon for the Shaft of at Water-wheel { and Mr. Pad- 

 bury's Guard for a' Can i age- wheel.— A Plate to describe Captain Peat's 

 Temporary Ship's Rudder.— A Quarto Plate of Mr. Samuel Jones's 

 Sofa Bed. 



