This day is published, in 8vo, price 6s. boards, 



DESCRIPTION of an ELECTRICAL TELEGRAPH, and of 

 some other Electrical Apparatus : with Eight Plates, engraved by 

 owiiy. 



By FRANCIS RONALDS. 



" Volenti nihil difficile." 

 Printed for R. Hunter, 72, St. Paul's Churchyard. 



ENGRAVINGS. 



Vol. LVII. A Plate illustrative of Mess. CErsted and Ampere's 

 lectro-magnetic Experiments, and Mr. Perkins's Paper on the Com- 

 ressibility of Water. — A Plate illustrative of Mr. Jamieson's Marine 

 ^'hermonieter Case, and Mr. Jennings's Mercurial Log-Glass. — A Plate 

 lustrative of Dr. Hare's new Modification of Galvanic Apparatus. — A 

 late representing a Double Canal Lock, originally proposed for the Re- 

 ent's Canal, by Mr. R. H. Gower ; and a Modification of Electro-Mag- 

 letic Apparatus, by Mr. Tatum. 



Vol. LVni. A Plate illustrative of Mr. Geo. Innes's Calculations of 

 be Annular Eclipse of the Sun, which will happen on the l5th of May 

 |S."6. — A Plate descriptive of tha Hydrostatic Balances of Isaiah 

 .UKENs and Dr. Coates. — A Plate illustrative of "An Introduction to 

 le Knowledge of Funguses." — A Plate illustrative of Professor Davy's 

 ,actometer, and of Mr. John Murray's portable Apparatus for restor- 

 ig the Action of the Lungs. — A Plate by Portek, Illustrative of Mr. 

 choolcraft's Account of the Native Copper on the Southern Shore of 



ake Superior ; and of Dr. Millar's Observations and Experiments on 

 be Rose of Jericho. — With a Portrait of the Editor, engraved by 

 ."■homson from a Painting by Frazer ; — and a Plate by Porter, illus- 

 rative of Mr. Leeson's Appendage to Tofft's Blowpipe. 



Vol. LIX. A Plate illustrative of Mrs. Ibbetson's Paper On the 

 lower-buds of Trees passing through the Wood. — A Plate descriptive 



the Instruments employed in determining Altitudes from the Trigono- 

 letrical Station on Rumbles Moor, Yorkshire. — A Plate illustrative of 

 Ir. Ivory's Theory of Parallel Lines inGeometryj Mr. Leeson's Safety 

 ilowpipe Appendages; Mr. Moore's new Apparatus for restoring the 

 Lction of the Lungs in Cases of suspended Respiration ; and Dr. Reade's 

 lommunication on Refraction. — A Plate illustrative of a curious Electro- 

 nagnetic Experiment by Mr. Barlow; and Mrs. Ibbetson's Paper on 

 be Perspiration alleged to take place in Plants. — A Plate illustrative of 

 4r. Marsh's Paper on a particular Construction of M. Ampere's Ro- 

 iting Cylinder. 



Vol. LX. A Plate illustrative of Mrs. Ibbetson's Paper on the Pollen 

 f Flowers. — A Plate illustrative of a Paper by Mr. R. Taylor, of Nor- 

 yich, on Fossil Bones from the Norfolk Coast. — A Plate illustrative of a 

 i*aper by F. Baily, Esq. on the Stars forming the Pleiades. — A Plate 

 Uustrativeof Prof. Amici's New Sextant. 



Vol. LXI. Engravings — 1. Illustrative of Mr. Tredgold's Paper on 

 he Flexure of Astronomical Instruments. — 2. Deurbroi cu and Nu 

 jHOLs' Apparatus for Madame (jervais' New Method of Fermentation. 

 —A Plate illustrative of Mr. R. Taylor's Geological Section of Hun- 

 itanton Cliff", Norfolk. — A Plate illustrative of Mr, Tatum's Communi- 

 »tion on Electro-Magnetism. 



