TO CORRESPONDENTS. 



Mr. Farey on Tuning Musical Instruments in ouy next. 

 Mr. Holdred's Communication came too late for this Number, 

 shall have a place. 



Mr. Pasley 01) the Dry Rot in Timber, also in our next. 



ENGRAVINGS. 



Vol. XLV. A Plate to illustrate the Nourishment produced to the 

 Plant by its Leaves. By Mrs. Ibbetson. — A Piute to illustrate Mr. 

 Bakewell's Sketch of the Arrangement of the Rocks and Strata in the 

 Northern Counties of England. — Plates to illustrate Mr, Robertson 

 Buchanan's Description of the Steam-Boats on the Clyde ) and Mrs. 

 Ibbetson's Paper proving that the Embryos of the Seeds are formed in 

 the Root alone. — A Plate to illustrate Mr. John Walters's Improve- 

 ments in Naval Architecture. — A Quarto Plate on the Roots of Plants < 



Plate of Mr. Singer's Electric Columns ; Mr. Walker's Electrometer ; 

 Rochon's Apparatus for ascertaining the Heat of coloured Rays. 



Vol. XLVI. Mr. T. Jones's Nevv'^Reflecting Compass. — Mr. Woolf's 

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

 trate Mr. Woolf's Improvement on the Steam-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.DeNeli: 

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

 — A Plate to illustrate the Electrical Experieients ofM^ De Nelts o 

 Malines. — Woole's improved Steam-Engine. — A Plate to illustr.ite Mr 

 Evans's Paper on guiding Balloons through the Atmosphere. — A Plat' 

 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 «)i 

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

 count of Mr. Stephenson's Safo-Lamp for Coal-Mincs. 



Vol. XLVII. Illustrated with a Quarto Plate describing the Plant 

 SPH.ERE of Dendera. — A Quatto Plate to illustrate Mr. Brown's Papc 

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

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

 of the Temple of Kournou at Thebes. — A Plate of the new Batlis it 

 Ramsgate 



Vol. XLVIII. A Quarto Plate of the Strand or Waterloo Brijge erecte 

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

 Mrs. Ibbetson's Anatomy of Vegetables.-^A Quarto Plate to illusiiat 

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

 Plate to illustrate Mrs. iBBETsoN'sPaper en a new View of Vegetable Lif 

 — A Quarto Plate to illustrate Mrs. Ibbetson's Paper on the Physiolog 

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



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

 Terrestrial Magnetism ; a new Electro-atmospherical Instrument ; ar 

 Mr. Andrew Horn's Paper on Vision. — A Quarto Plate to illui,tra 

 Mrs. Ibbetson's Physiology of Vegetables. — A Plate to illustrate t! 

 Solar Spots which appeared during the Year 1816; — ^^and Mr. Bev/ 

 Improvetnenton the Sliding-Rule. — A Plate descriptive of Mr.EMMKTT 

 Instrument for the Measurement of the Moon's Distance from the Su 

 Sec. ; also a New Refleciing Goniometer. — A Plate to illustrate Chevali 

 Baader-'s Method of communicating Rotatory Motion; Lieut. Shuli 

 ham's improved Method of working a Capstan j and Steele's new M| 



