ENGRAVINGS. 



Vol, XXXVI, Design for a Cast-iron Tunnel to cross the Thames, 

 by Col. Lennon. — ^Two Plates to il!u tratc Hady's Crystallography.— A. 

 Head of Buchanan, from an original Portrait by Titian: engraved by 

 WooLNOTH. — A Plate to illustrate the Paper on Musical Intervals. — A 

 Plate to illustrate Mr, Salmon's Paper on Building fn Pise, and his Ma- 

 chine for securing Depredators without injuring them. — A Plate to illustrate 

 a Memoir by M. Hassenfratz on the Alterations which the Light of 

 the Sun undergoes in pas.ising through the Atmosphere.— Mr. Spencer's 

 Camp Telegraph. — Section of Timahoe Bog in Ireland. — A Transversa 

 Section of LuUy more Bog, — part of the Great Bog of Allen. — Berthgllet's 

 Manometer. 



Vol. XXXVII. Plates i and 2, Representaittons of Luminous Animals, to 

 illustrate Mr. Macartney's Paper on that Subject. — Quarto Plate of the Orbits 

 of the newly discovereilTlanets. — A Quarto Plate to iiluslrateM-PiiYRAKD's 

 Paper on Burning Mirrors. — A Plate to illustrate Mr. Donovan's Paper 

 on Electro-chemical Agency. — Mr. Accum's New Mineralogical Apparatus. 

 —Mr. Lee's Thrashing Machine. — Mr. Cook's Apparatus for making Gas 

 and other Products from Pit-Coal ; and Mr. Way's Method of procuring 

 Turpentine from Fir-Trecs. — A Plate to illustrate Dr. Bkewster's Paper 

 on the Power of the Lever, 



Vol. XXXVIII. Mr. Donkin's Tachometer. — Mr. Allan's Mathematical 

 Dividing Engine. — A 4to Plate of Mr. Loeschmak's Patent Piano-Forte, 

 and Mr. Lis ton's Patent Enharmonic Organ.— A Plate to illustrate Mr. 

 Hauy's Paper on the Klectricity of Minerals. — Mr. Walker's improved 

 Micrometer. — Mr. Moult's Filtering Apparatus.—Mr.SMiTH's Method of 

 relieving a Horse fallen in the Shafts of a loaded Cart. — Mr. John Taylgk'b 

 Air-Exhauster for Mines. — A Representation of the Comet now visible in 

 Ursa Major. — Sir How \rd Douglas's Patent Reflecting Semicircle. — 

 A coloured Mjp to illustrate Dr. Campbell's Paper on t!ie inferior Strata 

 of the Earth occurring in Lancashire. — Mr. Sadler's Apparatus for 

 Smelting of Lead. — A Plate to illustrate Mr. William Smith's and Mr. 

 Edwaku Martin's Reports on the State of the Collieries at and near Nail- 

 eea, in Somersetshire. — Mr. Sadler's Apparatus for Smelting of Lead.— 

 A Plate to illustrate the different Theories ol Arches or Vaults, and of Domes. 



Vol. XXXIX. Mp.Steevens's New Levelling-Staflf. — A Map illustrating 

 the Great Derbyshire Denudation. — A Quarto Plate to illustrate the Opti- 

 cal Instrument called the Dlacatoptron. — A Plate of Mr. Steevens's 

 Contrivance for freeing Water-pipes from Air : engraved by Mr. PoaTER.— 

 Mr. Allan's improved Reflecting Circle. — Mr. Wood's inclosed Grind- 

 stone for Pointing Needles, and Mr. WiinsTEii's Method of carrying off 

 Steam from Boilers. — Mr. Brunton's improved Pump for raisinsf Water 

 while Shafts or Pits are sinking. — Mr. Hodgson's improved Mariner's 

 Compass for correcting the Magnetic Variations. — A Quarto coloured Plate 

 to illustrate the Geology of Part of the Vicinity of Dublin. 



Vol. XL. A Plate to illustrate the Fo'indation of Mr. William Joniss 

 temporal y Corn Rick. — Mr. STEi'Hr.Ns's Method of dividing Bricks. — 

 Section of Mr. William Jones's temporary Corn Kick. — Mr. Waistbll's 

 Improvenunt on the Aconi Dibble. — A Plate to illustrate Mr. Tawsey's 

 New Thrashing Machine. — Two Octavo Plates descriptive of a New Ma- 

 chine for Pumping Water. — Two I lates de>criptive of the Muscular Mo- 

 tion of Snakes. — Figures to illustrate such Poitions of a Sphere as have 

 their Attraction expressed by an algebraic Quantity — Van Helmont's 

 Diflercniial Thermometer. — Formation of Ovals for Gardeners. — Chavasse's 

 Mai iiic Transit. — A Plate to illustrate Mr. Brodie's Experiments 09 

 tJij Ijifl'vicncc of i|ie Drain on the Gcnciuticn of Animal lie^it. 



