CONTENTS. 



Art. I. On the Volcanic Strata exposed by a Section made 

 on the site of the New Thermal Spring discover- 

 ed near the Town of Torre del Annunziata, in 

 the Bay of Naples ; with some Remarks on the 

 Gases evolved by this and other Springs, con- 

 nected with the Volcanos of Campania. By 

 Charles Daubeny, F.R.S. and F.G.S., Pro- 

 fessor of Chemistry, Oxford. Communicated by 

 the Author, ----- Page 221 



II. Inquiry into the Changes which the Atmosphere 

 undergoes when in contact with certain Vege- 

 tables which are destitute of green leaves, &c. 

 By M. F. Marcet, 232 



Section I. On the Action of Mushrooms on Atmosphe- 

 ric Air, - - - - - - 235 



II. On the Action of Mushrooms upon pure 



Oxygen Gas, 240 



III. On the Action of Mushrooms on pure Nitro- 

 gen Gas, 242 



III. On the Distinctive Characters of the Dog, the Wolf, 

 and the Fox, as supplied by the Skeleton. By 

 M. Marcel de Serres, - - - 244 



