.. -»i/j. i'Ervs's Mercurial Voltaic Conductor. — Leslie's Dif- 

 f:rentiaV Thermometer. Diagrams to illustrate Dr. Woll^ston's Peri- 

 scopic Camera Obscura and Microscope. — Count JIumford's improved 

 Coffee-pots, — Mr, Goss's Instrument to U'ork Addition of Numbers 

 with Accuracy and Dispatcli. — Mr. Davis's har.giivg Scaffold; and 

 Mr. MAK.TiK'is Meihcfd of relievin;;; a Horse from a Cart Avhen fallen 

 dovu in its Shafts. — A Quarto Plate to illustrate Mr. J. liicKs's Ac 

 count of the Situation and Means of rai.-iing the lloyal George.-— A Place 

 to iilusraVi-' Mr. Southiuin's Essayonths Equilibrium of a Combination 

 of Beamc, Blocks, &.-. and on the Polygon of Forces.— A Plate t^) illustrate 

 Mr. Stu£vkns"s .'\cccunt of a Meteor seen at London and other Places in 

 Marcii l;:st. — A PL:te to 'illustrate Mr. Machei.l's Annular Saw, 



Vol. XLll. A Plate containing Professor Leslie's Atniometer, and 

 Figure! to illustraJe Dr. Wollaston'.s Paper on the elementary Particles 

 of certain Crystals. — A Skerch of that Pare of the Island of Java whH:h 

 contains the iiafjral Lake of Sulphuric A cid.-^— Interior of Volcano in the 

 I .land of Java, and Figures to iliu.s'rate Mr. Vv'alicej^'s Paper on the Elec- 

 tiic Fluid. — A Plate to i'.lustrate M. Link's Memoir on the Ar.atomy of 

 Plants, a,rd Dr. WoLLAsroKs Cryophorus. — A third ;PJ ate to !llu;>trato 

 M.'LiNK'i Memoir on the Anatomy of Plants. — Mr. T. Jones's Seclo- 

 gfaph, — a njw Inslnimenl for dividing ri^ht Lines into-equahParts, measur- 

 ing Angles, and inscribing Polygons in the Ci.-Cie,.&c. 



Vol. XLIIf. A Plate to iilustrate a New Transil Instrument "invent: d 

 "by Sir H. C. E-GLEinErD, Bart,— A Plate to iilustrato the l^t-e of Aiv- 

 Vessels in F^ants. By-Mrs. Ibbetson. — A Plate to illustrate M. Ge- 

 MENTiKi's new Appar:ttus for producing Qx;'gen G'isto restore sus-. 

 ];snded Animatbr, — Mr. Readl'.s Paper on tht Refraction of the S?>lar 

 Pays — ^^and ivir. Harpreaves's Observations on Colours. — A Plate to 

 illustrate Mr, J. Whitford's Tiiechanicai Substitute for Leeches; andMr, 

 J. Tilljzy's HyJro-pneu.matii: Blow-pipe. -— A'Plave to describe Mr. 

 P^. KuGiiEs's Gudgeon for thsShaitof a Water-wheel ; and Mr. Pad- 

 r.uRY's Guard for a Carriage-v;h£el, — A Plate to describe Captain pEi\T's 

 Temporary Ship's Rudder.' — A Oiiarto Plats of Mr. Samuel Jones's 

 S;,fa"Bcd. ""^^ 



Vol. XLIV, a Plate to illustrate Mr. iruME's Gazometer and Blow- 

 pipe; a, Proposal for an Improvement of the .Galvanic Trough ; ;ind a 

 new App-^ratu? for prepatirij'j pure Muriatic Acid.- — A practicai D!a>:^j-H!;i 

 for obtaining the Lunar Distances observed by a St'-ftant, — Electrical 

 Apparatus to illustrate M,r. BrandeV Paper on ^oXiC new ElecJ^iical 

 Paainoniepa' — A Quarto Plats to illustrate-Mrs. Ibbstson's Paper on the 

 Cuticle of Leaves, — Brunton's Patent ChAin Cable. — Figures relative to 

 Dr. Brp.',vster.'s Papur on the Aftections of Light trar.sjTiitted throu'^Ii 

 crystaiii/ed Bodies. — A Plate to iiluKrate Dr. B-k.ev,'ster's Pajtcr riven 

 in ou? last N'.imber. •, 



VoUXLV. A Plate to illustrate the Nourish ment'prodiicc'd to th.e 

 Plant by its Leaves. By Mr<:. Tbijetson-. — A Plate, to illustrate Mr. 

 Bakewe-ll's Sketch of the Arrangement of the Racks and Strata in tlie 

 Nortborn Counties, of England. — P-lnte*to illustrate Mr. Robe^itso^j 

 Buchanan's Description of tiie St.eam-B::aJ:5 on the Clyde; and Mrs. 

 InEEnoN's Paper proving that tlje Embryos of the Steds are forrned in 

 the Root alone. — A Pi'ite to, ilkutraie Mr, John Walters's Improve- 

 nicnts in Naval Architecture. — A Quarto Piute 6n the Roots of Plants. — 

 An Octavo, Plate of Mr, Singer's Electric Columns; Mr. V/alker's 

 Electrometer; Rochon's Apparatus for asccrtaini.ng the Heat of coloured 

 Rays, - ' 



Vol. X.LVI. Mr.T. Jones's New Jlefl;?cling Compass.—Mr. V/oolf's 

 Patent Boiler for Steam Engines and other purposes. 



