ENGRAVINGS. 



Vol. XXXII. Mr. Cleall's Machine for thrashing Hemp ; and Mr. 

 Bond's Machine ior breaking Hemp. — VI r. Ward's Compensation Pen- 

 dulum. — Mr. Gkoombridge's Diagram of the Motion of the Planet Vesta. 

 — A Portrait of Sir H. C. Englkfield. — Mr. Charles L? Caan's 

 Tram-Piates — and Mr. Collier's Ship Stove. — Apparatus employed by 

 Messrs. Allfn and Pepys in their Experiments on Respiration. — Mr. 

 Henry's Apparatus for Decomposing Compound Inflammable Gases. — 

 Apparatus employed in the Royal Institution for the Decomposition or 

 Potash by Iron. — Bell's Method of saying Shipwrecked Maiiners. 



Vol. XXXIII. Mr. James Elmes's Portable Bridge.— Mr. Kkight's 

 new Method of training Fruit Trees.— Mr. Herschel's Figures of th^ 

 Comet of 1807. — Two Plates to illustrate iJr. William Richardson's 

 Paper on the Basaltic Surface of the Counties of Derry and Antrim : viz. 

 A View of Portmoon. — A View of Pleskiv, on the N. W. Side of Ben- 

 gore Promontory. — Mr. Clegg's Apparatus for making Carbona'ed Hydro- 

 gen Gas from Pit-Coal.— Mr. Richardson's Machine for raising large 

 atones out of the Earth ; — and Mr. Gough's new Hygrometer. — Pilton's 

 Light Fence for Inclosures, which becornes invisible at a short Distance. — ' 

 Proposed Improvements in Telescopes, by M. Burckhardt and by Dr. 

 Brewster ; and M. Boi'llay's Apparatus for Phosphoric Eiher, — Major 

 Le Hardv's Telegraph. — Capt. Bolton's irn proved Jury Mast; and Capt. 

 Batls Method of Fishing Anchors. — Plan and Section of the Thames 

 Archway. — Plan of Stonyhurst Scientific Establishmcnt.-^Mr. Tad's Me- 

 thod of causing a Door to open over a Carpet ; — and Mr. Barlow's WrencK 

 for Screw Nuts of any Size. 



Vol. XXXIV. Two Plntes to illustrate M. H.i.uy's Cry.nallogrsphy.— 

 Apparatus to illustrate Mr. Davy's Bakerian Lecture. — A Quano and an 

 Octavo Plate descriptive of Mr. Tkoughton's new Dividing Instrument.— 

 A Pi ate to illijstrate Mr. Varley's Paper on 'Ihundcr Storms ^ — Anoihej- 

 Plate to illustrate Hauy's Theory of Crystallization.— A Quarto Plate to 

 illustrate Mr. Kikwan's new Anemometer; engraved by Pokter. — An 

 Octavo Plate to illustrate M. Hauy's Cry.^tallography; engraved by Lowry. 



A Pl?te to iRustrate Messrs. Allen and Pepys's new Exi)criments on 



Respiration. Engraved by Po-^tfr.^.A Plate to illusttate M. Hacy's 

 Crystallography. — A Plate illustrating the Construction of Mr. Clegg's 

 Jlotative Steam Engine.— Another Plate on the same Subject.' — A Plate of 

 Crystals to illustrate M. Hauy's System. 



Vol. XXXV. A Head of M. Hauv, engraved by T. Woolvoth from 

 an original Drawing by F. Massaed. — A Plate iiiu'.«trating M. Hauy's 

 Crystallography.— Dr Woj-lastow's Goniometer: Dr. PIealy's^ New 

 Cupping Instrument: and a Diagram to illustrate Mr. Walker's Theory 

 of Vision. — A Plate to illustrate Hauy's Crystallography. — Mr. Caven- 

 dish's dividing Instrument. — New Electrical Apparatus.— A Plate to illus-^ 

 trate Wi. Hauy's System of Crystallography. — Mr. Accum's Hydro-pneu- 

 matic Table.— A Piate to illustrate M. Hauy's Crystallography.-— Captain 

 Pasley's Telegraph, and Mr. Johns's Apparatus tor Decomposing Potash 

 and Soda. — Diagram^ to illustrate M. Monge'r Paper on theCompositiori 

 and D.composidon of Forces.— A Plate to illu^-tratc Hauy's Crystallo- 

 graphy. — Two Plates of Apparatus employed by Mr. Davy in the Electro- 

 chemical Experimeais detailed in his Bakerian Lecture. 



