ENGBAVINGS. 



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

 by Col. Lennon. — Two Plates to illustrate Hauy's Crystallography.^ — ?i. 

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

 WooLNOTH. — A Plate to illuitrate the Paper on Mu!:ical Interxals. — A. 

 Plate to illustrate Mr. Salmon ;; Papei on 15uilding in Pise, and his Ma- 

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

 a Memoir by M. Hassenfratz on the Alterations which the Light o{ 

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

 Camp Telegraph — Stiction ot Timal.oe Bog in Ireland. — A 'IVansverie 

 Section of Lullymorc Bog, — part of the Great Bog of Allen. — Berthollet's 

 Manometer. 



Vol. XXXVII. Platrs i and 2, Representjwions of Luminous Animals, to 

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

 of the newly discovered Planets. — A Quarto Plate to illustrateM.PiyRARo's 

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

 on Electro-chemical Agency — Mr. AccuM'sNewMineralogical Apparatus. 

 — Mr. Lee's Thrashing Marhine. — Mr. Cook's Ai)paratus for making Gas , 

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

 Turpentine tro.n Fir Trees. — -A Plate to illustrate Dr. Bkewster's Pai>er 

 on the Power of the Lever. 



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

 Dividing Engine.— A 410 Piate of Mr. Loeschman's Patent Piano- Forte, 

 and Mr. Liston's Patent Philharmonic Organ. — A Plate to illustrate Mr. 

 Hauy's Paper on the Electricity of Minerals. — Mr. Walkkr's improved 

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

 relieving a Horse fallen in the Shafts of a loaded Cart. — Mr. John Taylor's 

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

 Ursa Major. — Sir Howard IJouglas's Patent Reflecting Semicircle.— • 

 A coloured Mip to illustrate Dr. Campbell's Paper on the 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. 

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

 sea, in Somtrsetshire. — Mr. Sadlfr's Apparatus for t>melting of Lead.— « 

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



Vol.XXXlX. Mp.Steevens's New Levelling-StafF. — A Map illustrating 

 the Great Derbyshire Denudation. — A Quarto Plate to illu!>trate the Opti- 

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

 Contrivance for freeing Water-pipes froon Air : engraved by Mr. Porter.. — 

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

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

 Ste»m from Boiliis. — Mr. Bsonton's improved Pump fcr raiMnjj Water 

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

 Compass for correcting the Magnetic Variations. — A Quano coloured Pla:e 

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



Vol. XL. A Plate t6 illustrate the Foundation of Mr. William JoNkSs 

 temporary Corn Rick. — .\!r. Stephlns's Method of dividing Bricks.— 

 Section of Mr. William Jones's temporary Corn Rick. — Mr. Waistsll's 

 Improvement on the Acorn Dibble. — A Plate to illustrate Mr. Tawney's 

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

 chine for Pumping Water. — Two Plates descriptive of the Muscular Mo- 

 tion of Snakes. — Figures to illu^trat'j such Po> lions of a Sphere as have 

 their At raction expressed by an algebrai. Quantity — Van Helmont's 

 DilTerAntialThermotnetcr. — Format-on of Ovals lorGardeners. — ^Chavasse's 

 Marine Transit. — A Plate to illustrate Mr. BRomt's Experiments en 

 the Influence of the Bruin on the Generation of Animal licit. 



Vol. XLI. PfPYs's Mercurial Voltaic Conductor. — Leslie's Dif- 

 ferential Thermometer.— Di.ierum: to illustrate Dr. Wollaston's Peri- 

 ;.copic Citmeru Obscura and Microscope. — Count Rumford's improved 

 ColTec-pots. 



