CONTENTS. 



Effects of Compression in modifybig the Acllon of Heat, 

 By Sir James Hall, Bart. F.R.S. Ediu 140 



XXV. Additional Experiments and Remarks on an arli- 



Jicial Substance ivhlch possesses the principal characteristic 



Properties of Tannin. By Charles Hatchett, jB^-^. 



F.R.S 155 



KXV-I. A simple and accurate Mode of constrncting Gaso- 

 meters for Purpose's iihere vnifnrm Pressnre is essentiiil, 

 ly the Application of the Hydrostatic Regulator. By 

 JosEi'H Steevens, Esq ifi'i 



XXVII. Proce.-iS employed io obtain a Black Liquid, indented 

 by ]\fi\ Clarke, an Enqlishfnan, and introduced into 

 ■Commerce', its Use in m<irking Linen in a solid and dnra- 

 ide Manner, and its Application for printing Cottons or 

 Stuff's. By I\L IhzKMiisr AT>T,i^f Berlin .. .. \G5 



XXVI II. Letter of Messrs. Ciosi and pETnixr to Pro- 

 fessor Pacchiani, of Pisa, on the supposed Production of 



Muriatic Acid by Galvanism. 167 



XXIX. On the Decomposition cf Water by Galvanism. 

 i?y John CuTiiBERTsoNT, Esq 170 



IvXX. Notice of Experiments made by the Galvanic Society 

 of Paris on the Discovery annonnced by JSi. Pacchiani 

 ^f the Composition of the Muriatic Add . . . . 17^ 



XXXI. Extract of a new Letter of Dr. FnANCis Pac- 

 chiani, Professor cf Natural Philosophy In the Univer- 

 sity of Pisa, to 3i.' Faekoni, upon the Composition of 

 the Muriatic Acid .. .. 176 



XXXII. Proceedings of Learned Societies .. ,. 180 



XXXIII. Intelligence and JSllscellaneous Articles .. 188 



XXXIV. ykcount of a Series of Experiments, showing the 

 Ef'ecls of Compression in modifying the Action of Heat. 

 % .Sir James Hall, Bart. F.R.S. Edln. .. 193 



XXXV. A new Fact In Galvanism. Communicated by a 

 Correspondent • . . 203 



XXXVI. On Uacclnatlon. An Examination of several of the 

 Mi€-statemrnts of Dr. Rowley. By Mr. J. J. 11 aw- 

 Kix.s, of L. ling ton 204 



XXXVII. On the Method of extracting Spirits from. Po- 



tatoes. 



