ENGRAVINGS. 



Vol. XXVI. is illustrated with a Quarto Plate of M. Le Rov's Chrono- 

 meter — Mr. Sylvester's improved Air-Pump — A large Plate relating to 

 Le r. oy's Chrononr;eter — An Octavo Plate on the same Subject — The lush 

 Canal Track-Bout — Mr. Stejevens's Autocratic Cock for large Reservoirs — 

 M»". Woolf's improved Piston for Steam-Engines — Another Plate relating 

 to the same Subject. 



Vol. XXVII. is illustrated with a Quarto Plate of Mr. Steevens's Com- 

 pound Gasometer — Mr. Maseres's Fire- Escape — Mr. Walker's nevr 

 Optical Instrument called the Pi'.'ant7smasc.fr — Mr. Snodgrass's Method 

 of Heating Buildings and Apartments by Means of Steam — Mr. Trotter's 

 Machinery for Curvilinear Sawing, and Mr. Hardie's Improved Book- 

 binder's Cutting Press — Mr. Geohge Field's Stove for Heating Rooms, 

 and Drying various Articles — Figures illustrating the Manner of using Mr. 

 Walkfr's Transit Instrument — Dr. Wollaston's Camera Lucida for 

 drawing from Nature in Perspective. 



Vol. XXVIII. is illustrated with Mr. Kater's Hygrometer — R amsden's 

 Optigraph improved by Mr.- Jones — Figures fo illustrate Mr. Evans's 

 Paper on Goniometry — Apparatus employed by Mr. Davy in his new Gal- 

 vanic Experiments — Descroizilles' Alkali-meterj and Figures to illus- 

 trate C. A. Prieur's Experiments on the Decomposition of Light — A 

 Quarto Plate, containing a Skeleton of the Indian Elephant — An Octavo 

 Plate on the same Subject — A Quarto Plate of Tables relating to Musical 

 Temperature, by Mr. Farey — Anatomical Figures relating to the Elephant. 



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

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

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

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



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

 late of the Appsiaius employed by Mess. Allen and Pepys in their Ex- 

 periments en Carbonic Acid — A fourth Plate to illustrate M. Cuvier'« 

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

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

 iey's Improved Telegiaph : engraved by Porter. 



Vol. XXX. Sir H. C. Englei-ield's Mountain Barometer, engraved by 

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

 Plate on the same Subject. — i and 2. Two Plates to illustrate M. Cuvier'."! 

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

 Herscmels Paper on Coloured Rings. — .A Skeleton of the American 

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

 mill of Bangalore. 



Vol. XXXI. 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 Trees by Abscis- 

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

 Mrs. D'Oyley's Methoc of breeding Poultry ; Mr. Drew's Balance Level 

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

 Tuhrell's Construction of Chemical Muffles. — Mr. Gilpin's Machine 

 for raising Coals and Ores. — 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 ionproved Hydrometer for weighing Solids and Fluids. 



