ENGRAVINGS. 



Vol. LIT. A Plate illustrative of Mr. Upimgton's Elc-ctriciil In- 

 creaser for the tinerviiig Manifestation of small Portions of the Electric 

 Fluid. — A Plate illustrative of Mrs. Ibbktson's Paper on tlie Fructifica- 

 tion of Plants.— A Plate illustrative of the Rov. John Michell's TJieory 

 of the Formation of the Earth. — A Plate illustrative of Capt. Kateji's 

 Article on the Pendulum ; and New Apparatus for impregnating Liqnids 

 with Gases. — A Plate illustrative of Sir H. Davy's Apparatus for Vola- 

 tilization of Phosphorus, and Mr. Smith's Essay on the Structure of the 

 poisonous Far.gs of Serpents. 



Vol. LIII. A Plate illustrative of Dr. Ure's Experiments on Caloric, 

 Mr. Luckcock's Paper on the Atomic Philosophy, and Mr. Bolton's 

 on, the Purification of Coal Gas. — A Plate representing Mr. Ren.nie's 

 Apparatus employed in his Experiments on the Strength of Materials; 

 and the Marquis Ridolphi'g Improvement on the Gas Blow-pipe. — A 

 Plate illustrative of Mr. Meikle's Paper on Calorific Radiation; Mr. 

 Lowe's on the PuriScation of Coal Gas; and Mr. Hughes's on ascer- 

 taining Distances. — A Plate illustrative of Dr. Olinthus Gregory's 

 Paper on the different Rates of Pennington's Astronomical Clock at tlie 

 Island ofBalta, and at Vv'^oolwich Common. 



Vol.LIV. A Plate illustrative of the Menai Bridge.— A Plate illus- 

 trative of Mr. Lowe's Description of a Mercurial Pendulum.— A Plats 

 illustrative of Mr. Hare's Calorimotor, a new Galvanic Instrument. — A 

 - Plate illustrative of Captain Sarine's P ipcr on Inegnlarities obse.'-ved in 

 the Direction of the Compass Needles of the Isabella and Alexander in 

 the Late Voyage of Discovery ; and Mr. Scoresbv's Anom.aly in the Va- 

 riation of the Magnetic Needle as obsei ved on Ship-board. 



Vol. LV. A Plate exhibiting Sketch of ihe Comet's Pith of .July 1819. 

 —A Plate illustrative of the Annular Eclipse of tlie Sun on the 7th of 

 September next. — A Plate illustrative of Mr. Lane's Instrument for 

 gathering Fruit; Mr. Young's Mode of preparing Opium from the 

 Papaver somniftTum; and of Captain Forman's Essay on a Property in 

 Light which hiLherto has been unobserved by Pliilosophers. — A Plate de- 

 scriptive of Mr. Cuthbert's improved Hydro- pneumatic Apparatus, &c. 

 — A Plate illustrative of Capt. Forman's Essay on the Rc(l<'clion, Refrac- 

 tion, and Inflection of Light, &c. ; and Mr. Charles Bonnycastle's 

 Communicacion respecting the Influence of Masses of Iron on the Mari- 

 ner's Compass. 



Vol. LVI. A Plate illustrative of Mrs. Ibbetson's Paper on the Phv- 

 siology of Botany. — A Plate illustrative of Mr. Hall's pL-rcussion Gun- 

 Lock; of Dr. Kitchiner's Pancralic Eye-Tube ; and of Mr. Park's 

 Mooring Blocks. — A Plate exhibiting Sections, &c. of Mr. Malam's im- 

 proved Gas-Meter. — A Plate exhibiting tlie Discoveries made by Caiit. 

 Parry in the Polar Sea. 



Vol. LVII. _ A Plate illustrative of Mess. O-Irsted .and Ampere's 

 Electro-magnetic Experiments, and Mr. Perkins's Paper on tiie Com- 

 ■-^-,sibility of Water. — A Plate illustrative of Mr. .Tamieson's Marino 

 jimoiucler Case, and Mr. .Iennings's Mercurial Log-Glass. — A Plate 

 tralivc of Dr. Hake's new Modification of Galvanic Apparatus. — i\. 

 ■e representing a Double Canal Lock, originally proposed for the Rc- 

 iL's Canal, by Mr. R. H. Gov/er ; aiul :i Modincutioa of Electro-Mag- 

 ic Apparatus, by Mr. Tatum. 



Vol. LVIII. A Plate illustrative of Mr. Geo. Innf.s's Calculations cf 

 Annular Eclipse of the Sun, which will happen on thcl.xli of May 



