TABLE OF CONTENTS 



TO THIS FOURTEENTH VOLUME. 



MAY, J 806. 



Engravings of the following Objects i 1. A new Lamp, by Count Rumford ; 

 2. The Escapement of Arnold's Chronometer, for which the Commissioners 

 of Longitude have lately voted a Reward of Three Thousand Pounds. 



L Account of a simple and cheap portable Barometer, with Instructions to en- 

 able a single Observer to deterniine Heights by that Instrument with consider- 

 able Facility and Precision. In a Letter from Sir H. C. Englefield, Baronet, 

 M. P. F. R. S. &c. &c. Page 1 



IL Account of a Series of Experiments, shewing the Effects of Compression 

 in modifying the Action of Heat. By Sir James Hall, Bart. F. R. S. Edin- 

 burgh. - - - - - - - - - 13 



III. Observations on Dispersion of the Light of Lamps by Means of Shades of 

 unpolished Glass, Silk, &c. with a Description of a new Lamp. By Benja^ 

 min Count of Rumford, Read at the National Institute of France, March 

 50, ■ 1806. ------- 23 



IV. Facts towards a History of Tin. By Professor Proust. - 38 



V. Experiments and Observations respecting the Manner in which the Gases 

 are afforded in A¥ater by Galvanism, and various essential Points of Theory. 



• By H. B. K. - - - - - - - 50 



VI. A Chemical Examination of the Bark of the White Willow, and of the 

 Root of the Herb Bennet, compared with Quinquina; considered in a medi- 

 cal Point of. View. By M. Bouillon Lagrange. Read before the Society of 

 Mediciue at Paris. - - - - - - ' 56 



VII. Explanation of Timekeepers, constructed by the late Mr. John Arnold ; 

 for which a Reward of Three I'housand Pounds was given by the Board of 

 Longitude to his Son, Mr. J. R. Arnold. Extracted from the Account deli*- 

 vered by the latter to tiie Commissioners. .- - - 64 



VIII. An Essay on the Cohesion of Fluids. By Thomas Young, M. D. For. 

 . Sec. R. S. ..... . . Yi 



JUNE 



