ENGRAVINGS. 



Vol. XXIX. is embellished with a Portrait of the late Dr. Darwin j 

 from an original Picture in the Possession of Dr. Thornton— A New Mi- 

 crometer, invented, by Mr. Brewster— A Representation of tne Comet 

 now visible. — Mr. Field's Plan for Building Towns and Villages com- 

 posed of Circular Buildings — Mr. Pepys's New Eudiometer — A Quarto 

 riate of the Apparatus employed by Mess. Allen and Pepys in their Ex- 

 perimenis on Carbonic Acid — A fourth Plate to illustrate M. Cuvier's 

 Paper on Elephants — Lieut. Col. Crichton's Bed for the easy Conveyance 

 of Sick and Wounded Soldiers: engraved by Porter — And Capt. Pas- 

 LEY's Improved Telegraph: engraved by Porter. 



Vol. XXX. Sir H. C. Englefield's Mountain Barometer, engraved by 

 Lowry — A Plate to illustrate M. Cuvier's Paper on Elephants — Another 

 Plate on the same Subject. — i and 2. Two Pjates to illustrate M. Cuvier's 

 Paper on Elephants, engraved by Porter. — 3. Figures 10 illustrate Mr. 

 Herschel 5 Paper on'Colouved Rings. — f\. Skeleton of the American 

 Mammoth, engraved by Porter. — A Portrait of M. Carnot— The Oil- 

 mill of Bangalore. 



Vol. XXX [. Mr. Davy's new Eudiometer. — Geological Sections of 

 Strata, in Matlock, Derbyshire, by Mr. Whitehurst and Mr. Farey.-^ 

 Illustration of the Chinese Method of propagating Fruit Tr-.^es by Abscis- 

 sion — And Mr. Bboad's Gauge for measuring Timber. — Illustration of 

 IVIrs. D'Oyley's Method of breeding Poultry ; Mr. Deew's Balance Level 

 for laying-out Land for Irrigation ; and an Experiment in Optics. — Mr. E. 

 Turrell's Confetruction of Chemical Muffles. — Mr. Gilpin's Machine 

 for raising Coal.s and Ore-. — Wilson's Secure Boat, or Life Boat} and 

 Boswell's improved Capstan : engraved by Porter. — Pepys's Apparatus 

 for Decomposing the Alkalis under Naphtha: engraved by Lowry. — 

 Atkins's improved Hydrometer for weighing Solids and Fluids, 



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

 Bond's Machine for breaking Hemp. — Mr. Ward's Compensation Pen- 

 dulum. Mr. Groombripge's Diagram of the Motion of the Planet Vesta. 



A Portrait of Sir H. C. Engl' field. — Mr. Charles Le Caan's 



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

 Messrs. Allen and Pefts in their Experiments on Respiration. — Mr. 

 Henry's Apparatus for Decomposing Compound Inflammable Gases — - 

 Apparatus employed in the Royal Institution for the Decomposition of 

 Potash by Iron. — Bell's Method of saving Shipwrecked Mariners. 



Vol. XXXIII. Mr, James Elmes's Portable Bridge. — Mr. Knkjht's 

 new Method of training Fruit Trees. — Mr, Herschel's Figures of the 

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

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

 A View of PouTMooN. — A View of Pleskin, on the N. W. sideof Ben- 

 wore Pronootitory. — Mr. Clegg's Apparatus for making Carbonated Hydi:.- 

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

 Stones out of the Earth ; — and Mr. Gouoti's new Hygrometer. — Pilton's 

 liight Fence for Inclosures, which becomes invisible at a short Distance. — 

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

 Brewster ; and M. Boullay's Apparatus for Phoi^phoric Ether. — Major 

 Le Hardy's Telegraph. — Capt. Bolton's improved jury Mast; and Capt. 

 Ball's Method of Fishing Anchors. — Plan and Sectioii"of the Thames 

 Archway. — Plan of Stonyhurst Scientific Establishment. — 'Mr.' T*d's Me- 

 thod of causing a Door io open over 4 Carpet ; — and Mr. BARiiP w's Wrev^h 

 for Screw Nuts of any Size. 



Vol. XXXIV. Two Plates to illustrate M, Hauy's Crystallography.— 

 Apparatus to illustrate Mr. Davy's Bakcrian Lecture. 



