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PHYSICAL AND MATHEMATICAL SECTION. 
Annual Meeting, March 28th, 1876. 
E. W. Binney, F.K.S., F.G.S., President of the Section, 
in the Chair. 
Arthur Schuster, Ph.D., and R. F. Gwyther, B.A., 
were elected members of the Section. 
The following gentlemen were elected officers of the 
Section for the ensuing year : — ■ 
^WSibeUT. 
E. W. BINNEY, F.E.S., F.G.S. 
JOSEPH BAXENDELL, F.R.A.S. | J. B. DANCER, F.R.A.S. 
SAMUEL BROUaHTON, ESQ. 
THOMAS MACKERETH, F.R.A.S., "".M.S, 
April 25th, 1876. 
Alfred Brothers, F.RA.S., in the Chair. 
Mr. Baxendell read a paper “ On the Connexion between 
the Humidity of the Air and the Amount of Ozone,” in 
which it was shown from observations made at the South - 
port Observatory during the four years ending June 80th, 
1875, that in the months of January, February, March, Sep- 
tember, October, November, and December the amount of 
ozone was above the mean when the relative humidity of 
the air was below the mean, while in the months of April, 
May, June, July, and August it was above the mean when 
the relative humidity was also above the mean. The excess 
with a relative humidity below the mean was greatest in 
the months of September, November, and December; and 
Peoceedings—Lit. & Phil. Soo,— Vol. XV.— No. 11.— Session 1875-6. 
