iv CONTENTS. 



JULY 1801. 



Engravings of the following Objefts : 1 . Mr. Cuthbcrtfon's Apparatus for Ex- 

 periments on the Oxidation of Metals by Electricity ; and, 2. A new Im- 

 provement in the Steam Engine, by which the Boiler is fupplied with Water 

 already near the Point of Ebullition. 



I. Outlines of Experiments and Inquiries refpefiing Sound and Light. By 

 Thomas Young, M.D. F.R.S. (Concluded from page 9 1 .) p. 121 



II. On the Means of foretelling the CharaiSler of the Summer Seafon, and the 

 Benefits to be expefted from the Cultivation of Grafles which vegetate at low 

 Temperatures. In a Letter from Dr. Tho. Beddocs. - p. 131 



III. Analyfis of Manachanite from Botany Bay. By Richard Chenevix, Efq, 

 F.R.S. and M.R.I, A. Communicated by the Author. p. 132 



IV. A Series of Experiments upon Metals with an Eleftrical Battery, fliewing 

 their Property of abforbing the Oxigen from the Atmofphere when exploded 

 by Ele6lric Difcharges. By John Cuthbcrtfon, Philofophical Inftrument 

 Maker, No. 54, Poland Street, London. Communicated by the Author. 



p. 136 



V. Defcription of an Improvement in the Steam Engine, by Means of which the 

 Boiler is conftantly fupplied with Water already heated nearly to the Point of 

 Ebullition. Communicated by Mr. Peter Keir, Engineer. p. 147 



VI. Inquiries relative to the Laws of Affinity. By Citizen Berthollet, Merab«r 

 of the National Inftitute of Arts and Sciences. (Continued from page 108.) 



p. 149 



VII. On the Ufe of Steam as a Vehicle for conveying Heat from one Place 

 to another. By Count Rumford. - - • n p. 15^ 



AUGUST 1801. 



Engravings of the following Objefts : 1 . Figures illuftrating the Properties of 

 Sound and Light; and, 2. Apparatus to fliew the Tranfmiffion of Heat 

 through Fluids downwards. 



I. A Letter from Thomas Young, M.D. F.R.S. ProfefTor of Natural Philofophy 

 in the Royal Inflitution, refpefting Sound and Light, and n Reply to fome 

 Obfervations of Profeffor Robifon, - - - p. 161 



11. Oa 



