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ENGRAVINGS, 
and other Products from Pit-Coal ; and Mr. Way’s Method of procuring 
Turpentine from Vir Trees. —A Plate to illustrate Dr. Buewster’s Paper 
on the Power of the Lever. 
Vol. XXXVIL. Mr. Dowg in’s Tachometer.—Mr. Artan’s Mathematical 
Dividing Engine—A 4to Plate of Mr. Lorscuman’s Patent Piano-Forte, 
and Mr. Liston’s Patent Eeharmonic Organ.—A Plate to illustrate Mr. 
Havy’s Paper on the Electricity of Minerals —Mr. Warxer’s improved 
Micrometer.— Mr. Movutr’s Filte:ing A pparatus.—Mr.SmitH’s Method of 
felieving a Horse fallen in the Shafts of a loaded Cart.—Mr. Joun Tay¥tor’s 
Air-Exbauster for Mines. —A Representation of the Comet now visible in 
Ursa Major.—Sir Howarp Doueézas’s Patent Reflecting Semicircle.— 
A coloured Map to illustrate Dr. Camppety’s Paper on the inferior Strata 
of the Earth occurring in Lancashire.—-Mr. Sapiex’s Apparatus for 
Smelting of Lead.—A Plate to illustrate Mr. Witiiam Suitu's and Mr. 
~ Epwarp Martin's Reports on the State of the Co'lieries at and near Nail- 
sea, in Somersetshire..—Mr. SapteR’s Apparatus for Smelting of Lead.— 
A Plate to illustrate the different Theories of Arches or Vau.ts,and of Domes. 
_ Vol. XXXIX. Me. Stet vens’s New Levelling-Statt-—A Map illustrating 
the Great Derbyshire Denudation.—A Quarto [late to illu-rate the ‘ipti- 
‘cal {nstrument called the Diacatoptron.— A Plate of Mr. Sreevens’s 
*Contrivance for freeing Water-pipes from Air: engraved by Mr. PorTEs.— 
) Mr. Arvan’s improved Reflecting Circle——Mr, Woon’s inclosed Grind- 
stone for Pointing Needles, and Mr. WenstEn’s Method of carrying off 
Steam from Boilers.—Mr. Bruntown’s improved Pump for raising Water 
while Shafts or Pits are sinking —Mr, Hopeson’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 Foundation of Mr. Wiiitam Jonss’s 
temporary Corn Rick.—Mr. Sreruens’s Method of dividing Bricks,— 
Section of Mr. WitL14M Jones's temporary Corn Rick.—Mr. WatstTzit’s 
_ Improvement on the Acorn Dibble.— A Plate to illustrate Mr. Tawney’s 
Wew Thrashing Machine,—Two Octavo Plates descriptive of a New Ma- 
chine for Pumping Water.—Two i'lates descriptive of the Muscular Moe 
tion of Snakes —Figures to illustrate such Portions of a Sphere as have 
their Attraction expressed by an algebraic Quantity —V4n Hetmont’s 
Differential Thermometer.—Formation of Ovals for Gardeners.~-Cuxavassr’s 
Marine Transit—A_ Piate to illustrate. Mr. Bropie’s Experiments on 
the Infinence of the Brain on the Generation of Animal Heat. | 
Vol. XLI. Perrys’s Mercurial Voltaic Conductor.—Lesiiz’s Dife 
ferential ‘'hermometer, Diagrams to. illustrate Dr. Wottaston’s Peri- 
scopic Camera Obscura and Microscope.—Count Rumrorp’s improved 
Coifee-pots.—Mr, Goss’s Instrument to work Addition of Numbers 
) with Accuracy and Dispatch.—Mr. Davis’s hanging Scaffold; and 
Mr. Marrix’s Method of relieving a Horse from a Cart when fallen 
_ down in its Shafts— A Quarto Plate to illustrate Mr. J. Hicrs’s. Xe 
nt of the Situation and Means of raising the Royal George.——A / late 
to illustrate Mr. Sournern’s Essay on the Equilibrium of a Combina cn 
of Beams, Blocks, &c. and on the Polygon of Forces.—~A Plate to il!ustrave 
>) Mr. Steevens’s Account of a Meteor seen at London and other Places in 
March last.—A Plate to illustrate Mr. Macuexy’s Annular Saw. 
Vol. XLII. A Plate containing Professor Lestie’s Atmometer, and 
‘Figures to illustrace Dr. Wottaston’s Paper on the elementary Varticles 
of certain Crysials—A Sketch of that Part of the Island of Java which 
contains the natural Lake of Suiphuric Acid.—Interior of Volcano in the 
Island of Java, and Figures to iliustrate Mr. Watker’s Paper on the Elec- 
tric Fluid—A Plate to illustrate M. Link’s Memoir on the Anatomy of 
Plants, and Dr. WoLtLastron’s Cryophorus, 
