o 



M TO CORRESPONDENTS. & 



aM The Medical PREMIUM in our next. ^ 



^ Sir WiLLTAM Adams on the Restoration of Vision will be inserted A 



"^ in our next, if possible. Kv 



V^.' Mrs. Ibretson's continuntion of the Dissection of Plants lias been \j^ 



^ received, and shall meet with every attention. ■ ^■1 



^ T\Ir. Drummond on Astro-atmospheiical Science shall have a place, "i^ 



•fij Mr, Mi;snETT on .alloying Iron with Manganese has been received. l(U, 



P Mr. Allen's Fik-st Essay «HI appear soon. \^u 



^ Mr. Knight's Letter, — Mr. Johnson's Experiments on Copper and W^ 



g^ Iron, — and A CoRUEsroNDENT's Geological Queries, in our next. V^ 



y Mr. Buddle's Remarks on the Siifety-lamp did not reach us till y-\ 



4k the SOth January, consequently could not possibly appear this ninnth. ^^ 



THEATRE ROYAL, HA YMARKET. ' 



N Friday Evening, February 21, and every Monday, Wednhs- 

 day, and Friday, during Lent, 



Mr. LLOYD will give Ms ASTRONOMICAL LECTURES on the 

 GRAND TRANSPARENT ORRERY. 



A few Notes on the CELESTINA will accompany the Change.s. 



ENGRxWINGS. 



Vol. XLVL Mr.T. Jones's New Reflecting Compass. — Mr.WooLF's 

 Patent Boiler for Steam Engines and other Purposes. — A Plate to illus- 

 trate Mr. Woolf's Improvement on the Steam-Engine, by Avhich the 

 possibility of Steam escaping past the side of the Piston is eiFectuaVly pre- 

 vented.— A Plate to illustrate someElectrical Experiments by M.DeNelis 

 of Maline.s; v.ith an Extension of tiiem by Mr. Singer and Mr. Crosse.. 

 —A Plate io illustrate the Electrical Experiments of M. De Nelis of 

 Malines. — Woolf's improved Steam-Engine. — A Plate to illustrate Mr. 

 Evans's Paper on guiding balloons through the Atmosphere. — A Plate 

 illustrative of Dr. Brewster's Paper on Light. — A ito Plate to illus- 

 trate Sir H. Davy's Paper on the Fire-damp of Coal-Mifies, and on Me- 

 thods »;f lighting the Mines so as to prevent its Explosion j and the Ac- 

 count of Ivlr. Stephknson's Safe-Lamp for Coal-ilines. 



Vol. XLVIL Illustrated with a Quarto Plate describing the Plaxi- 

 SPHERE of Dkndera. — A Quarto Plate to illustrate Mr. Browne's Paper 

 on Architectnre. — A Plate to illustrate Sir George Cay«.ey's Paper on 

 Aerial Navigation; and Mr, London's Hydrometer. — A Quarto Plate 

 of the Temple of Kournou at Thebes.— A Plate of the new Baths at 

 Ramsgate. 



Vol. XLVIII. A Quarto Plate of the Strand or Waterloo Bridge erected 

 over the Thames at tlie Savoy, London. — A Quarto Plate to illustrate 

 Mrs. Ibbetson?* Anatomy of Vegetables. — A Quarto Plate to illustrate 

 Mrs. Ibbv.'tson'3 tfaper on the Physiology of Vegetables. — A large Qu.irto 

 Plate to illustrate Mrs. Ibbetson's Paper on a new View of Vegetable Life. 

 —A Quarto Plate to illustrate Mrs. Idbetson's Paper on the Physiology 

 of Vegetables j and Mr, Mo&nav's Mass of Native Iron found in Brasif. 



