ADVERTISEMENT. 



The Society as a body is not to be considered responsible for any 

 facts and opinions advanced in the several Papers, which must rest 

 entirely on the credit of their respective Authors. 



The Society takes this opportunity of expressing its grateful 

 acknowledgments to the Syndics of the University Press, for their 

 liberality in taking upon themselves the expense of printing this Volume 

 of the Transactions. 



ERRATA. 



I— 1 



Page 471, line 1 of the second paragraph, for — read ^=± 



1.2. ..a? 1.2...* 



Page 472, line 18, for (-l)C read (-l) r C 



-X -X 



Page 638, line 14,/or 273°(C) read -273°(C) 



Page 653, line 5, for u read u n 



Page 653, line 11, for «° read u 



Page 573, line 3 from bottom, for 11 feet read 3 feet 



Pages 573, 574, dele beds cxv. cxvi. 



