ENGRAVINGS. 



Vol. XXIV. i? embellished with a Plate of TigurfS to illustrate Mr Dal- 

 ton's Theory of the Absorption of Ga5es by Liquids — On the same; — al-o 

 a Refrigeratory for Distillation, acting on the Prirciple of the Syphon— The 

 Etierts prod'.icsd ffy Mr. Ez. Walker's newly invented Cometarium — 

 A Qtiurto Plate illustrative of Experiments by Sir James Hall, Bart., on 

 the Effects of Compression in modifying the Action of Heat — Mr. Stek- 

 VENs's improved Gasometer, for Purposes where uniform Pressure is essen- 

 tial. A Fhile illustrating Mr. Walker's Paper on the apparent Magnitude 



1)1 "the h lizontal Moon — A Quarto Plate illu-trative of Sir Jamks Hall's 

 Experiments on the Effects of Heat modified hy Compression — A Portrait 

 of Mr. Aoeert: engraved by Mr. E. Mackenzie — A Quarto Plate of Na- 

 tural History, viz. the Fishes Eranoplilui Muiisii, Jstrohh-pus Grixalvii. and 

 Piir.ehdiis Cychphvi ; and a South American Monkey, the S'ania Icotiina : 

 engraved by Lowry. 



Vol. XXV. contains an Octavo Plate illustrative of Experiments by Sir 

 James Hall on the Efiects of Compression in modifying the Action of 



Heat A Quarto- Plate on the same Subject — A Quarto Plate to illustrate 



Sir James Hall's Paper on »he Effects of Heat moditied by Compre.ssion 



Mr. Salmon's improved Geonii'trical Quadrant, Level, and Calculator, < 



for ascertaining inaccessible Distrnces on Land or at Sea. — M. Montgol- 

 jier's new Calorimeter, for determining the comparative Quantities of' 

 Ca'oric evolved by the Conihustion of dillerent Kinds of Fuel — Mr. GiL- 

 EEBT Gilpin's improved Crane with Flexible Chains — Mr. Herbert's 

 book-case Bolt, and Mr. Le Caans Check for Carriage Wheels on Rail- 

 Roads — Salmon's Improvement on Canal I^cks — Figures to illustrate 

 M. GuoTTiiiUss Memoir on the Decomposition of Water by Galvanism 



A Bust in Silex, found coated over with Calcedony. 



Vol. XXVI. is illustrated with a Quarto Plate of M. Le Roy's Chrono- 

 jx,e',er — Mr. SvLvtsrER's improved Air-Punip — A large Plate relating to 

 Le Roy's Chronometer — An Octavo Plate on the same Subject — The Irish 

 Canal Track-Bont — Mr, Stebvens's .Autocratic- Cock for large Reservoirs — 

 Mr. Wooi.r's improved Piston for Steam-Engines — Another Plate relating 

 to the sime Subject. 



Vol. XXVI 1. is illustrated with a Quarto Plate of Mr. Steevens's Com- 

 pound Gasometer — Mr. Maserfs's Fire Escape — Mr. Walker's new 

 Optical Instrument called the P/jar.t ;srttasrt>pr-r-Mr. Snodguass's Method 

 of Heating Buildings and A^partmcnts by Means of Steam — Mr. Trotter's 

 ^iactiinery for Curvilinear Sawing, and Mr. Haruie's Improved Book- 

 binder's Cutting Press— Mr. Gr.owc.E Field's Stove for Heating Rooms, 

 and Drying various Articles — I'igures illustrating the Manner of using Mr. 

 Walui^r's Transit Instrument — Dr. Wollaston's Camera Liicida for 

 drawing from Natuie in Perspective. 



Vol. XX VIII. is illustrated with Mr. Kater's Hygrometeri — Ramsden's 

 Optigraph in:proved by Mr. Jones — Figures to illustrate Mr. Evans's 

 Paper on Gonionictry — Apparatus employed by Mr. Davy in his new GaU 

 %an:c Experimeiitr — Dlscuoizilles' Alkali-meter; and Figures to illus- 

 trate 4^.»A. Prieur's Experiments on the iJccomposition of Light— A 

 Quafto Plate, containing a Skeleton of. the Indian Elephant — An Octavo 

 I'l.tte-on fh^-same Subject — A Quarto Plate ot Tables relating to Musical 

 TempenUnre, by Mr. Farey — .■.nat.o.mical I''igures relating to the Elephant. 

 Vol. XXIX. is. embellished with a Portrait of the late Dr. Darwin ; 

 fiom an original Picture in the Possession of Dr. Tho.^nton — A New Mi- 

 crometer, invented by Mr. Bri.wster — A Represciilation of the Comet 

 ,, •; V ^;: I,. — ^>'r. Field's Plan for Builiiin;^ To-.vns and Villages com- 



