■ Experiments made ly the Galvanic Society of Paris. 55 



to call antient, such volcanoes as have burned in the sea 

 before our continents were laid bare.; and to call extinguish' 

 ed, those onlv which from their situation might be burning 

 still, if in the inflammable matters which fed them were not 

 burnt out, 



I have now concluded my observations. I have had no 

 other object in making these observations, than to explain 

 in a clearer manner the great phenomena of volcanoes, that 

 we may not attribute effects to them in which they have no 

 share, nor refuse to allow them such as they really produce. 

 These limits, founded upon uell ascertained facts, are able of 

 themselves to banish tho system, s founded upon contrary- 

 notions, and to give more certain bases to geology, that 

 branch of knowledge so important in terrestrial physics. 



VI. Account of some additional Experiments made ly the. 

 Galvanic Society of Paris. Communicated by M, Hif- 

 FAULT *. 



JL HEGaIvanicSociety!iadannounced,thatalthoughthcv were 

 anxious to verify the fact advanced by Pacchiani, of the for- 

 mation of the muriatic acid in distilled water when submit- 

 ted to the galvanic action, yet that no satisfactory result 

 had been hitherto obtained. The Society, in ]Hiblishing the 

 detail of their experiments, in the pursuit of which they ri^ 

 gorously conformed themselves to the course pointed out by^ 

 M. Pacchiani himself, manifested an intention of repeating 

 and varying these experiments in f]i]tc a different manner, 

 before drawing any conclusion upon so important a disco- 

 very. It was in these circumstances that M, Brugnatelli, 

 one of the corresponding members of the Society, transmit- 

 ted from Pavia some observations which he had communi- 

 cated to the National Institute of Ttalyj-, containing an ac- 

 count of his experiments upon the same suhjec-t, which had 

 completely succeeded, but under certain modifications in the 

 manner of proceeding. The Society, after having been made 

 acquainted with this memoir, ascertained that in the appara- 



• From /li'"iilcs (le Cliiir'ie, torn. !x. p. 1 115. 

 f Sec Piiil- Mag vol. XXV. p. 57 and l.J i. 



D 4 tug 



