N.B.—The first five volumes are subdivided into three parts. Part I., comprehending the His- 
tory of the Society, is contained under one set of pages; and Part II., comprehending the Papers, 
is contained under two sets, viz. Papers of the Physical Class, under the one; and Papers of the 
Literary Class under the other. The references in this Index are accordingly designated in the 
class to which they belong by the letters P. C., L. C., and H. The numeral letters refer to the vo- 
lume, the figures to the pages. 
