HISTORY OF THE SOCIETY. 



49] 



atmospheres. That this property does not belong to the lique- 

 fied gases exclusively, but resides equally in all other fluids, when 

 raised above their boiling points, is shewn by the following ex- 

 periment ; thus, ether, when raised from the temperature of 60° 

 to 95° of Fahr., or its boiling point, undergoes an inconsiderable 

 expansion compared with the expansion produced by an equal 

 increase of temperature above its boiling point, when it may be 

 said to be in the same condition with the liquefied gases in re- 

 gard to pressure, and carbonic acid suffers nearly an equal ex- 

 pansion by an equal increasing temperatuie with the liquefied 

 gases. — The members afterwards adjourned to Dr Hope's labo- 

 ratory, when Mr Kemp, Dr Hope's Experimental Assistant, ex- 

 hibfted an apparatus he had constructed for the repetition of the 

 experiment on the solidification of carbonic acid, which he had, 

 at the request of the Society, prepared for that purpose. 



Professor Traill, Vice-President, in the chair. — Dr Martin pg^ jy 

 Barry exhibited the ganglion oticum in the human subject, as 

 dissected by himself imder the eye of Professor Tiedemann of 

 Hiedelberg, and pointed out, by means of very large and care- 

 fully . executed diagrams, taken from the drawings of Arnold, 

 its connection with the organ of hearing — Professor Jameson 

 communicated a notice by M. Dufrenoy on the period and mode 

 of formation of the Monte Somma, and of Vesuvius. He also 

 communicated a notice to prove that we have no historical evi- 

 dence of the existence of the fossil Elk of Ireland and the Isle 

 of Man as a living species, the rude figure in the cosmographia 

 of Munster not representing the elk but the fallow-deer. — Sir 

 Patrick Walker exhibited some insects which prove verj' de- 

 structive to the pine forests in the Highlands of Scotland, and 

 made a few observations on their mode of boring into the wood. 



Dr Traill, Vice-President, in the chair — Mr James Wilson jj^^'^^'',j 

 read a paper on the Birds included under the genus Eurylaimus 



