CONTENTS, T, 



JUNE 1806. 



Engravings of the following Objects : 1. The Expansion Balance for Timepieces 

 of Arnold; 2. The Water Ram of Mongolfier; 3. Mr, Holden's Machine for 

 rendering Part of the Work of Shoemaking less detrimental to Health; 4. A 

 Galvanic Apparatus by Mr. Sylvester, in which one Metal is made to preci- 

 pitate another without Regard to the Order of Elective Attractions ; 3. A 

 Quarto Plate, containing Designs of Furnaces and Apparatus by which the 

 Force of Compression was ascertained in Sir James Hall's Experiment of ap- 

 plying Heat to Carbonate of Lime imder extreme Pressure. 



I. Letter of Inquiry from a Correspondent, respecting the spontaneous Recovery 

 of the Edge in dull Razors laid aside for a Time; and a Postscript, shewing 

 that Lavoisier has no Title to the Discovery of the Modern Theory of Oxi- 

 dation; with a Reply and some Remarks by W. N. - Page 89 



IL Observations and Experiments on Galvanism, the Precipitation of Metals by 

 each other, and the Production of Muriatic Acid. By Mr. Sylvester. 94 



IIL Of the Utility of the Water Ram. By M. Jos. Mongolfier, Demonstrator 

 to the Repository of Arts and Trades, Paris. With Remarks by W. N. 98 



IV. Account of a Series of Experiments, shewing the Etfects of Compression in 

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

 burgh. - - - - - - 113 



V. Investigation of the Temperature at which Water is of greatest Density ; 

 from the Experiments of Dr. Hope, on the Contraction of Water by Heat at 

 low Temperatures. By J. Dalton. - . . jgS 



VI. Analysis of a new Mineral found in Cornwall. By J. Kidd, M, D. &c. 

 &c. - - - - - - 134 



VI.* Second Essay on the Analysis of Animal Fluids. By John Bostock, M. D. 

 Liverpool. . _ - - _ i^q 



VIL The Report of a Committee of the Horticultural Society of London, 

 dfawn up at their Request by T. A. Knight, Esq. and ordered to be immedi- 

 ately published by the Council. - - - 15! 



VIII. Account of a Machine for performing the Thread- Work in Shoemaking 

 in a standing Posture; contrived, and for many Years constantly used by Tho- 

 mas Holden, Shoemaker, of Tettleworth, near Petworth, Sussex. 155 



IX. An Essay on the Cohesion of Fluids, ByThomas Young, M. D. For. Sec. 

 R.S. - - ' - - - - 158 



X. Facts and Observations relating to the Theory of Heat, Light, and Com- 

 bustion. By Mr. J. Arnold. - - - 161 



XL On Sugar of Grapes. By Professor Proust. - - 17& 



XU. Scientific News. - - . . . 179 



JULY 



