C ON' T E N' T S. 



XI 



~ fjuiilar combination is produced from fufphuret of iron prepared in the direft way. Tlie co^ 

 louring matter of lapis-iazuli is found by every experiment to be this blue fulphuret, and nothing 

 <^fe. 



V. Experiments made with the Metallic Pile of Sig. Volta, principally dire£ted 

 to afccrtain the Powers of different Metallic Bodies. By Lieut. Col. Henry 

 Haldane - - - - - p. 313 



Account of the cftccls of j>iles confifting of^inc, ^okl, filver, iron, copper, lead, tin, and mer- 

 cury, fcverally combined with each other in paini. Explotion oftheg^fos. Similar piles were 

 found to act raoderatclywell in almofpheric air 5 better in oxygen gas; and not at all in azote. 

 The refpirable gafes were diminiflied. 



VI. Inveftigation of the Powers of the Prifmatic Colours to heat and illuminate 

 Objefts : with Remarks that prove the different Refrangibility of Radiant 

 Heat. To which are added, an Inrjuiry into the Method of viewing the Sun 

 advantageoufly with .Telefcopes of large Apertures and high magnifying 

 Powers, and Experiments on the Refrangibility of the invifible Rays of the 

 Sun. ByWilliamHerfchel, LL.D. F.R.S. - - p. 320 



VIL Additional Experiments on Galvanic Ele£lricity. By Mr. Davy, Super-^ 

 intendant of the Pneumatic Inftitution - - p. 326 



Scientific News, Accounts of Books, Sec. - - p. 329— 336 



Board of Longitude of France. Prize of Aftronomy. — Tranflation of a Note of Oit. G. Cuvier, 

 relative to Foffil Subjeds of Natural Hiftory. — Hydraulic Engine operating by Mercurv. — Phi- 

 lofophical Tranfaclions of tlie Royal Society of London for the Year 1800. Part the' Firfl.— 



Royal Society of Copenhagen. — Decompofition of the fixed Alkalis. — Separation of Butter 



Beet Sugar and ardent Spirits. — Fourcroy's Synoptic Tables of Chemiftry. — Note from a Cor- 

 rcfpondent relpedting the Bolognian Phoi'phorus. — Extraftofa Letter from Mr. William Henry, 

 dated Sept. 2d, 1 800, to corred an Inference in his Paper on Galvanifm. 



— - — ' f 'i 1 1 r 'II 



NOVEMBER 1800. 



Engravings of the following Obje£ls: 1. An Improvement of Mr. Goodw}Ti's 

 Hydraulic Engine, by which its Powers are extended, and it is made to 

 work itfelf. 2. Cryftals of the Arra^onite. And, 3. Herfchel's Apparatus 

 for meafuring the Effefts of radiant Heat. 



I. Notice of fome Obfervations on the Caufes of the Galvanic. Phenomena, and 

 on certain Modes of increafing the Powers of the Galvanic Pile of Volta. By 

 Mr. Davy, Superintendant of the Pneumatic Inftitytion. Communicated by 

 the Author - - ,. > p, 337 



* g2 Zinc 



