ENGRAVINGS. | 5; 
Vol XXXVI, Plates x and 2, Representations of Luminous Animas to. 
#lustrate Mr. Macartney’s Paper on that Subject —Quarto Plate of the Orbits ae 
_ of the newly discovered Planets.—A Quarto: Plate to illustrate M.Peyrarp’s — 
oa Electro-chemical Agency.—Mr. Accum’s New Mineralogical Apparatus, 
“—Mr, Ler’s Thrashing Machine.—Mr.Coox’s Apparatus for making Gas. 
and other Products from Pit-Coal ; ; and Mr. Way’s Method of procuring 
Turpentine from Fir-Trees. —A Plate to illustrate Dr. barat aio 's Paper 
_on the Power of the Lever. 
Vol. XXXVIIL. Mr. Dowxn'sTachometer-—Mr. Acaw’ s Mathematical 
Dividing Engine —A 4to Plate of Mr. Lozscuman’s Patent Piano-Forte, © 
~ Paper on Burning Mirrors——A Plate to iHustrate Mr. Donovan's Paper 
and Mr. Lisron’s Patent Euharmonic Organ.—A Plate to illustrate Mr. 
Havy’s Paper on the Electricity of Minerals—Mr. Warker’ ¥ improved 
Micrometer.—Mr. Mourr’s Filtering Apparatus.—Mr. Smirn’s Method of; 
relieving a Horse fallen in the Shafts of a loaded Cart.— Mr, Jonn TAytor’s » 
Air-Exhauster for Mines. —A Representation of the Comet now visible in 
Ursa Major.—Sir Howaxrp Dovetas’s Patent Reflecting Semicircle— 
A coloured Map to illustrate Di. Campretr’s Paper on the inferior Strata. 
‘ 
of the Earth occurring in Lancashire—-Mf. Sadier’s Apparatus for 
Smelting of Lead.—A Plate to illustrate Mr, WituiaM Smirn’s and Mr. 
Epwarp Martin’s Reports on the State of the Collieries at and near Nail- 
' sea, in Somersetshire,—Mr. Sapier’s Apparatus for Smelting of Lead.— 
A Plate to illustrate the different Theories of Arches or Vaults, and of Domes. 
~ Vol. XXXIX. Mr.Srervens’s New Levelling-Staff—A Map illustrating 
the Great Derbyshire Denudation.—A Quarto Platt to illustrate the Opti-_ 
cal Instrument called the Diacatoptron.—A Plate of Mr. Sregyens's 
Contrivance for freeing Water-pipes from Air: engraved by: Mr. Porter. — 
Mr. Atvan’s improved Reflecting Circle——Mr. Woon’s inclosed Grind: 
wd 
~ stone for Pointing Needles, and Mr. Wenster’s Method of carrying: on 
Steam from Boilers.—Mr. Brunton’s improved Pump fvr raising Water 
while Shafts or Pits are sinking. —Mr. Hopeson’s improved Mariner’s — 
Compass for correcting the Magnetic Variations.—A Quarto coloured: Plate 
Se 
cillustrate the Geology of Part of the Vicinity of Dublin. , 
Vol. XL. A Plate to illustrate the Foundation of Mr. WiLLiam Jones? s 
temporary Corn Rick.—Mr. Stepuens’s Method of dividing Bricks.— © nee 
Section of Mr. Wittiam Jowes’s temporary Cor Rick.—Mr. W AlsTBLL’s’ 
‘Improvement on the Acorn Dibble.— A. Plate to illustrate Mr, Tawne?’s 
New Thrashing Machine.—-Two Octavo Plates descriptive of a New Mas 
'. chine for Pumping Water.—-Two Plates descriptive of the Muscular Mo- 
. tion of Snakes.—Figures to illustrate such Portions of a §phere as. have fh 
their Attraction expressed by an algebraic Quantity—-Van Hetmont’s 
Differential Thermometer. -—Formation of Ovals for Gardeners, —CHavassz? a7 
Marine Transit—A Plate to illustrate Mr. Bropie’s Experiments on 
the. Influence of the Brain on the Generation of Animal Heat. 
Vol. XLI. Pepys’s Mercurial Voltaic Conductor.—Lesiiz’s Dit : 
ferential Thermometer. ‘ Diagrams to illustrate Dr, Wottaston’ s Peri. 
scopic Camera Obscura and Microscope.—Count Rumrorp’s improved 
Coffee-pots.—Mr. Goss’s Instrument to work Addition of Numbers. 
with Accuracy and Dispatch.—-Mr, Davis’s hanging Scaffold; and 
Mr. Marrin’s Method of' relieving a Horse from ‘a Cart when’ fallen 
down in its Shafts — A Quarto Plate ta illustrate ‘Mr. J. Hicks’s Ac A 
count of the Situation and Means of raising the Royal George—-A Plate 
. to illustrate Mr, SougHern’? s Essay on the Equilibrium of a ‘Combination . 
of Beams, Blocks, &c. and on the Polygon of Forces—-A. Plate to illustsate Rix 
Mr, Stetvens’s Account of a Meteor seen at London and other Fase: 
March last.—A. Plate to illustrate Mr. Mac #BLL’s Annular. Saw, 
