^ ■ TO CORRESPONDENTS. 



^ Cnpt. Forman'i Paper wa¥ received at too late a period to be inserted 



J this month. ■"^ 



Mrs. IsnETSoN on Botanical Physiology has been received, and will 

 .« be inserted in our next. The other Communications alluded to by Mrs. I. 

 *K will meet with every attention. 



Just published, in one vol. 12mo. 9t. boards, 



A TREATISE on ADULTEJFLATIONS of FOOD, and CULI- 

 NARY POISONS, exhibiting the Fraudulent Sophistications df 

 Bread, Beer, Wine, Spirituous Liquors, TeajCofFee, Cream, Confectionary, 

 Vinegar, M-ustard, Pepper, Cheese, Olive Oil,- Pkkles, and miier Alticjds 

 employed in Domestic Economy^, and methods oi detecting them. "^y 

 FREDRICK ACCUM. Sold by Longman, Hurst, Rees, Orme, aftd 

 Brown, Paternoster ^row, London. 



ENGRAVINGC^•'. I 



Vol. XLVI. Mr. T. Jones's New Reflecting fpropass. — Mr. Woolf's 

 Patent Boiler for Steam Engines and other Pui*poses.— A Plate to illus- 

 trate Mr. Woolf's Improvement on the Steani-Engine, by which the 

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

 vented.— A Plate to illustrate some Electrical Experiments by M.DeNehs 

 of Malines ; with an Extension of them by Mr. Singer and Mr. Crossf.. 

 —A Plate to illustrate the Electrical^Experiments of M. De Nxlis of 

 Malines. — Woolf's improved Stean^EnpJne. — A Plate to illustrate Mr. 

 Etans's Paper on guiding Balloon* through the Atmosphere. — A Plate 

 illustrative of Dr. Brewster's Paper on Light. — A Quarto Plate to il- 

 lustrate Sir H. Davy's Paper on the Fire-damp of Coal-Mines, and^on 

 Methods of lighting thf Mines so as to prevent its explosion ; and the'Ac- 

 coantof Mr. Stephenson's Safe-Lamp for Coal-Mincs. 



Vol. XLVI I. Illustrated with a Quarto Plate describing the Plani- 

 srHERE of Dendera. — A Quarto Plate to illustrate Mr. Brown's Paper 

 on Architecture. — A Plate to illustrate Sir George Cavley's Paper on 

 Aerial Navigation ; and Mr. Lokdon'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 the Savoy, London. — A Quarto Plate to illustrate 

 Mrs. Ibbetson's Anatomy of Vegetables.— A Quarto Plate to illustrate 

 Mrs. Ibbetson's Paper on the Physiology of Vegetables. — A large Quarto 

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



A Quarto Plate to illustrate Mrs, Ibbetson's Paper on the Physiology 



of Vegetables ; and Mr. Mornay's Mass of Native Iron found^n Brasil. 



Vol. XLIX. A Plate to illustrate Dr. Evans's Communication on 

 Terrestrial Magnetism ; a new Electro-atmospherical Instrument ; and 

 Mr. Andrew HorK's Paper on Vision. — A Quarto Plate to illustrate 

 Mrs. Ibbetson's Physiology of Vegetables.— A Plate to illustrate the 

 Solar Spots wl;ich appeared during the Year 1816;— and Mr. Bevajj's 

 Improvement on the Sliding- Rule. — A.Plate descripti' ; of Mr.Ei»*ij|»'s 

 Injtrumcnt for tlie Measuiemcnt of the Moon's Dis&nce from ^P^n, 



