( 386 ) 



CHAP. XXII. 



DISCOVERY THAT VARIOUS VOLCANIC 

 PRODUCTS CONTAIN MURIATIC ACID 



ENQUIRY HOW THIS ACID HAS BEEN" 



PRODUCED, AND MIXED WITH THEM. 



Ah acid Uqiior extrafled from the fpotied 

 glafs of L'lpari^ during ignition— Proofs 

 that this acid is muriatic — T^he fame re- 

 fult followed on a repetition of the experi- 

 ment — Afimilar acid, liquor produced from 

 the black gl'fs of Lipari — Fadlitious 

 glaffes do not furnif it — Proof both by the 

 dry and humid nsjay^ that the muriatic acid 

 is not combined -with thefe two glajfes^ but 

 only mechanically united to their parts — 

 Seveji other 'volca7iic produHs fubjecled to 

 the fame experiments^ from fojne of ivhich 

 the fame acid liquor was obtained, and 

 from others not — Difcovery that this acid 

 does fiot exif in volcanic produds when in 



.' a fate 



