IV PREFACE. 



which may relate to two subjects, and also the titles of the papers 

 pubHshed in the ' Transactions,' and those of the principal notes 

 in the 'Proceedings' which do not appear elsewhere in the Journal. 

 It may be repeated here that it is no part of the object of the 

 ' Summary ' to criticise the views of the authors of the papers 

 abstracted, its main object being to bring to the notice of the 

 Fellows the contents of the principal papers from time to time 

 published, and which are scattered through a vast and ever- 

 increasing mass of periodical literature. The sources from which 

 the abstracts are taken are in all cases noted, so that reference 

 can readily be made to the originals. 



Fkank Crisp. 



