ENGRAVINGS 



Vot Will, is illustrated with a Plate representing a Variety of the 

 Genus Acarus—- Mr. Davy's Apparatus for the Anal). —An Ap- 



paratus tor the Use of Aquatinta l-ngravers, to prevent them from being 

 annoyed with the Acid fumes l/berated in the Process — A Skeleton of the 

 ; :in Ibis — Xhe Planet Saturn, according to the Form ascertained by 

 Herschel — A Portrait of JampsWatt, Esq. F;R.S.: en 



o'm an original Painting — Machine to enable Shoemakers to 



• n their Work in a standing Posture — A Plate illustrating Dr. Hek- 



, rtiona of the Heavens — Mr. Chm i tchine. 



for laying Land level — Apparatus for making Gastous Oxide of Carbon. 



Vol. XXI V. ia embellished with a Plate of Figured to illustrate Mr. Bal- 



Theory of the ion of Gases by I iquids— -On the same; — also 



a Refrigeratory for Distillation, acting on the Pri c'rple of the Syphon— The 



s produced \>y Mr. Ez. Walker's newly invented Cometarium — 



A Gtuarto Plate illustrative of Experiments by Sir Jamrs Hall, Bart., on 



the Effects of Compression in modifying the Action of Heat — Mr, Stee- 



's improved Gasometer, for Purposes where uniform Pressure is 



tial A Plate illustrating Mr. WaLker's Paper on the apparent Magnitude 



of the horizontal Moon — A Quarto Plate illustrative of Sir James Hall's 

 ] rimeiHS on the Effects of Heat modified by Compression— A Portrait 

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

 tural History, viz. the Fishes Eremoph'tlui Mutisil, Astrobhpus Grixalvu, and 

 lodus Cyclopum; and a South American Monkey, the Simla Icoiiina : 

 engraved by Lowry. 



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

 s Hall on the Effects of Compression in modifying the Action of 



LT ea t A Quarto Plate on the same Subject — A Quarto Plate to illustrate 



Sir James Hall's Paper on the Effects of Heat modified by Compression 



Mr. Salmon's improved Geometrical Quadrant. Level, and Calculator, 



lining inaccessible Distances on Land or at Sea. — M. MoNTGOL- 

 's new Calorimeter, for determining the comparative Quantities of 

 Caloric evolved by the Combustion of different Kinds Of Fuel — Mr. Gil- 

 bert improved Crane with Flexible Chains — Mr. Herbert's 

 Book -case Bolt, and Mr. Lk Caan's Check for Carriage Wheels on Raif- 



p,.oads — Salmon's Improvement on Canal Locks Figures to illustrate 



jM. Gkotthius s Memoir on the Decomposition of Water by Galvanism 

 — A Bust in Silex, found coated over with Calcedouy. 



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

 meter — Mr. Sylvester's improved Air-Pump — A large Plate relating to 

 L« i' mometer — An Octavo Plate on the same Subject — The Irish 



Canal Track-Boat — Mr. StREVENs'S Autocratic Cock for large Reservoir, — 

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

 to the same Subject. 



Vol. X >'.\ II. is illustrated with a Quarto Plate of Mr. Stf.f.vkns's Com- 

 pound er — Mr. Maslres's Fire-Escape — Mfc, Walker's new 

 Optical Instrument called the Phant.ismtucopc — Mr. Ssodgk ass's Method 

 ; Fmildings and Apartments by Means of Steam — Mr. Trotter's 

 Curvilinear Rawing, and Mr. Hardje's Improved Book- 

 :/s Stove for Heating Rooms, 

 and Living vatious Articles — Figures illustrating the Manner of using Mr. 

 • Instrument — Dr. Wollasion's Camera Luckla for 

 IK in Perspective. 



