ENGRAVINGS. 



Vol. XLIV. A Plate to illustrate Mr. Hume's Gazometer andBJow- 

 pipfe ; a Proposal for an Improvemeiit of the Galvanic Trough ; and a 

 new Apparatus for preparing pure M a: iatic Acid. — A practical Diagram 

 for obtaining the Lunar Distances observed by a Sextant. — Electrical 

 Apparatus to illustrate Mr. Brandb's Paper on some new Electilcal 

 "KiEnonien.-i^ — A Qunrio Plate to illustrate Mrs. Ieeetsom's Paper on tbe 

 Cuticle of Leave-;. — ^runtok's Pjrtent Chain Cable. — Figures lelative to 

 Dr. Brevster's Paper on the Affections of Light transmitted througi* 

 crystailized Bodies.— A Plate to illustrate D"r. Brewster's Paper given 

 in our kit Number. ', ' - ' 



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

 Plant by its Leaves, Ry Mrs. TsBtTsoK. — A Plate to illustrate Mr. 



■ Bakewell's Sketch ofthe Airajigement of the Koc.ls.5 and Strata in the 

 Northern Counties of England. — Plates to illui.t?ate 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 ia 

 the Root alone. — A Plnte to illustrate Mr.JoHM Walters's Improve- 

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

 Plate of Mr. Singhr's Electric Column;; Mr. Walker's Electrometer} 



• Roc HON 's Apparatus for nscertaining the Hesit of coloured Rays. 



Vol. XLVI. Mr. T. Jones's New R.eflecting Compass. — Mr. Woolf's 

 Patent Boiler for Steam Engines and cihef Purposes. — A Plate to illuc- 

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

 possibility cf Sceam escaping past the sic'e ofthe Pi;;ton is effectually nre- 



'• vented. — A PLueto iljustrutc some Electrical Experiments by M.DkNelis 

 «f Malines; with an Extension of them by Mr. Singer and Mr. Crosse. 

 — A Plate to illustrate the Electrical Experiments of M. De Nelis erf" 

 . Malines.— 'Woolf's ijn proved Steam-Engine. — A Plate to illu.strate Mr. 

 EvA>is*'s Paper on sru'ding Balloons through the Atmc-pherc. — A Plate 

 illustrative of Dr. Brew3T£r's Paper on Light. — A 'J to Pl^e to ilhis- 

 tv.ire Sir H. Davy's Paper on the Pire-damn of, Coal Mines, and on Me- 



^ iHoisof lighting the Mines so as to prevent its Explosion; and the Ac- 

 count of Mr. Step HKK son's Safe-Lamp for Coai-Mines. 



Vol. XLVII. Illustrated with a Quarto Plate describing the Plani- 

 sphere of Dendera. — A Quarto Piale to illustrate Tvlr. B^!own's Paper 

 on Architectnre.— -A Plate to illustrate Sir Georgi; Cayley'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. XLVIIL A Quarto Plate ofthe 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. Ibbstson's Paper on a new View of Vegetable Life. 

 — A Quarto i'late to illustrate Mr<. Ibeetson's Paper on the Physiology 

 of Vegetables ; and Mr. Mohnay's Mar.s of Native Iron found in Brasif. 



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

 Terrestrial Magnetism; a new Electro-atmospherical Instruiiu-nt; and 

 I\ir. Andrew Horn's Paper on Vision.^ 



