36 Proceedings. 



transformed into a substance like lignite,and burned like coal 

 A discussion on the character of the change in the wood 

 and on the presence and absence of wood in peat bogs was 

 participated in by Mr. C. Bailey, Dr. BOTTOMLEY, and 

 Dr. HODGKINSON. 



The third part of Dr. W. C. WILLIAMSON'S " General, 

 Morphological, and Histological Index " to his collective 

 memoirs on the fossil plants of the coal measi res was read. 



A paper by Mr. J. C. Melvill, M.A., F.L.S., on " Wul- 

 fenia Carinthiaca y ]dLcq\\m" was also *ead ; and a paper "On 

 the Osmotic Pressure of Solutions of Finite Concentration," 

 by Dr. THOMAS Ewan. 



