This Day is publLshed, 

 Price 31. 13s, 6d. in Boards, 

 , .VOL. Til. of 



TRANSACTIONS of the GEOLOGICAL SOCI-ETr, illustrated 

 by a Volume containing numerous Plates and Maps, most of ihcm 

 coloured. 



Printed and sold by Wni. Phillip-, George Yard, Lombard Street, 

 Loaders. ^ 



Of whom may also he had, 



THE FIRS r AND SECOND VOLUMES, 



Price 21. 2s., and 31. I6s., in Boards. 



ENGRAVINGS. 



Vol. XL. A Plafe to illustrate the Foundation of Mr. William Jokss's 

 temporary Corn Rick. — Mr.. Stephens's Method of dividing Bricks. — 

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

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

 New Thrashing Ma-hi: e. — Two Octavo Plates descriptive of a New Ma- 

 chine for Pumping Water. — Two i lates descriptive of the iVluscular Mo- 

 tion of Snakts, — Figures fo illufliate such Poi lion 3 of a Sphere as have 

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

 Diflerentia! Thermometer. — Format lonof Ovals for Gardeners,~-CHAVASL/4's 

 Marine Transit. — A Plate to illustrate Mr. Brodie's Experiments on 

 the Influence of the Brain on tht; Generation of Aniin^il Heat. 



Vol. XLI. Pkpys's Mcicmial Volraic Conductor.— Leslie's' Dif- 

 ferential 'i'hermometer.— ^Diagrams to iliuscrate Dr. Wollaston's Perl- 

 , icopic Camera Obscura and MiproscopC.-^ — Count Romford's improved 

 Colfee-pots. — Mr. Gosc's Imtrurnent to ' work Addition of Numbers 

 with Accuracy^ and Dispatcli. — .Mr. Davis's hanging 'ScafTold; and 

 Mr. Martin's Metiicd of relicvin.o: a liorse fiom a Cart when fallen 

 down in its Shafts. — .A Onano Plate to illustrate Mr. J. Hicks's Ac- 

 count of the Situation and Mtans of faisin^ th' Royal Georgf.— A Plate 

 to illustrate Mr. Southern's Essay on tlie Equilibrium of a Combination 

 of Beams, Blocks, &c. and on the Polygon of Forces. — A Plate lo illustrate 

 Mr. Steevens's Accoiint of a Meteor' st'C-n at London and other Places in 

 March last. — A Plate to illustrate Mr.. Mach ell's Annular Saw. 



Vol. XLII. A Flats' rontalning Professor Leslie's Atmomcter, and 

 Figures to illustrate Dr. Wollaston's Paper on the elementary {'articles 

 of certain Crystals. — ^^A Sketch of that Part of the Island of Javs whirji 

 contains the natural Lake, of Sulphuric Acid. — Interior of Volcano in the 

 Island of Java, and Figures to illustrate Mr. Walker's Paper on the Elec- 

 tric Fluid. — A Plate to illustrate M. Li.vk's Memoir on the Anatomy o£ 

 Plants, and Dr. Wollaston's Cryophorus.— A third Plate to illustrate 

 M.Lihk's Memoir on the Anatom.y of Plants. — Mr. T.Jones's Secto- 

 jjraph, — a new Instrument for dividing right Lines intfi equal Parts, meaauj- 

 i:)g Angles, and inscribing Polygons In the Circle, &c. 



