180 
societies and public bodies with which the Society is in 
communication ; and the Council believe that it will soon 
become necessary to provide additional library accommoda- 
tion, and to print a supplementary catalogue. 
The increase in the number of Photographic Societies 
having outstripped the progress of photographical invention 
and discovery, it has become very difficult to procure 
original papers and communications for discussion, and only 
two meetings, therefore, of the Photographical Section have 
been held during the session. The Microscopical and 
Natural History, and the Physical and Mathematical Sec- 
tions have, however, maintained their usual activity and 
interest, and their meetings have been well attended. 
Some of the papers brought before them during the session 
have been passed by the council for printing in the Society’s 
Memoirs. 
The system of admitting Sectional Associates continues 
to work satisfactorily, and the Council therefore recommend 
that it be continued during the ensuing year. 
The following papers and communications have been read 
at the ordinary and sectional meetings of the Society during 
the session now ending : — 
October 6th , 1868.— On Convertent Functions,” by Chief Jus- 
tice Cockle, F.R.S., &c. Communicated by the Rev. Professor 
Harley, F.R.S. 
“On the Rev. T. P. Kirkman’s Method of Resolving Algebraic 
Equations,” by the Rev. Robert Harley, F.R.S., &c. 
October 20i th, 1868. — “On Observations of Atmospheric Ozone,” 
by Joseph Baxendell, F.R.A.S. 
November Srd, 1868. — “Remarks on Mr. Baxendell’s Laws of 
Atmospheric Ozone,” by Professor W. Stanley Jevons, M.A. 
“ On the Structure of an Undescribed Type of Calamodendron 
from the Upper Coal Measures of Lancashire,” by Professor W. C. 
Williamson, F.R.S. 
November 9 th, 1868. — “ A Resume of the More Important 
Papers bearing upon Microscopical Research which have appeared 
