21 
Ordinary Meeting, October 20tli, 1868. 
J» P. Joule, LL.D., F.R.S., &c., President, in the Chair. 
“ On Observations of Atmospheric Ozone,” by Joseph 
Baxendell, F.R.A.S. 
The remarkable nature of the conclusions arrived at by 
Mr. Mackereth, F.R A.S., in his paper “ On Ozone and its 
Probable Connexion with Solar Radiation,” read at the 
meeting of the Physical and Mathematical Section held on 
the 21st of April last, has led me to examine and discuss 
the series of ozone observations made at the Radcliffe Ob- 
servatory, Oxford, during the years 1856-65, as well as 
several other series which have fallen under my notice. It 
will be seen from the results which I now proceed to give 
that Mr. Mackereth’s conclusions are not borne out, but that 
nevertheless the subject of atmospheric ozone is one of much 
interest, and merits more attention on the part of meteorolo- 
gists and physicists than it has yet received. 
Observations at the Radcliffe Observatory, Oxford . 
At the end of the volume of “ Radcliffe Observations” 
for 1864 a table is given showing the “Mean Monthly 
Quantities of Ozone, as determined by Schonbeins Ozono- 
meter in a period of Ten Years, commencing with 1856.” 
The observations had been made twice daily, at lOh. p.m. 
and lOh. a.m., and the mean monthly values are as 
follows : — - 
Proceedings — Lit. & Phil. Society. — Vol. VIIL-^No.2. — Session 1868-9. 
