Vol. 58. PhilosopMc0.1 Magazine 



Dp.c. i 



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CONTENTS-OF NuMBER 284. 



LXXXII. Description of an Appendage to Tofft's 

 Blowpipe, to make it serve as a Substitute for Brookes s 

 Gas Blowpipe. By Mr. H. B. Leeson. - •■ P^gf ^01 



LXXXIli- Further Researches on- t!i^ .magjietlc Phae- 

 nomena produced by Electricity; with some new Expen- 

 ments on the Properties of electrified Bodies in their Kela- 

 ticns to conducting Powers aiid Temperature. By "feir 

 Humphry Davy, Bart., P. R.S. - : •;" " 



LXXXIV. Account of an Hydraulic Oi3*ry on an im- 

 proved Principle of Motion. By Mr. C. A. Bu sby. 



LXXXV. On the rolling Pendulum. By James Ivory, 

 M.A.F.R.Sf - - - 



I.XXXV. Some Observations and Experiments <^ the 

 Papyri found in the Ruins of Herculaneum. By Sir Hu M. 

 PHRY Davy^ Bart. P.R.S. - - " " 



LXXXVI. Remarks on Dr. Reade's Paper on Refrac 

 tion. By Mr. Charles Stark, of Portsmouth. 



LXXXVII. Thoughts on the Cultivation of Maize as a 

 green Crop, to come in late in the Summer and Autumn. 

 By A Practical and Experimental Farmer. 



I^XXXVIII. Answers to " Questions addressed to Na- 

 turalists." By Mr. Gavjn Inglis. - - 



LXX:jiIX. On Mr. South's Catalog-ue of Double Stars. 

 V^ By A Correspowdent. - - - - 



^ XC. Notices respecting New Books. . . - 

 XCI. Proceedings of Learned Societies. 

 XCII ' -itelligence and Miscellaneous Articles :~To our 

 Readers. -Population of France.— Antiquities of Nubia.-- 

 Sierra Leone Negotiation. — Australasia. — New SouUi 

 Wales.— Natural History: Whales, Sea Serpent, Gigantic 

 Polypus. Female Shark.— Fossils.- Superb Mummy.— 

 Meteoric Stones. -Meteor.— The Shower of Snails.— Earth- 

 quakes.-Extrj«)rdinary Shipwr.eck.-South American Bo- 

 tany .-South American Potatoe.— Spade and Plough Hus- 

 bandry.- Animal Sagacity— Magnetism,— Letter from Mr. 

 Ivory to the Editor.-Patents— Barometric Obser^'at.ons. 

 —Astronomical and Meteorological Tables— Index. iM- 



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* * Communications for this Work, received by the Edito 

 PIckctt-Placc, Temple Bar, will meet with every attention. 



IlICIIARD AND ARTHUR T*^10R,PRINTER$, SHOri-AK*, LO.NUf. 



