George Biddell Airy to Faraday   22 April 1854

Royal Observatory Greenwich | 1854 April 22

My dear Sir

Simultaneously with the Ozone observations made here, we have had observations made at the Hospital Schools and on the declivity of Lewisham Hill (Dartmouth Terrace). You know the locality generally, the three are nearly but not quite in a straight line: the distance of the Hospital Schools about 1300 feet, that of the Lewisham station 1 mile. I enclose you the results. Also those at Bexley Heath.

The reason for my troubling you with these is that I am struck with their discordance. They seem to have no particular connexion, except that on the whole the morning numbers are larger than the evening numbers. In other respects they are so unlike that they seem to suggest - either that our modus operandi is wrong, or that the phaenomenon registered is something so very local as to be of no particular use.

Pray instruct me on all this.

I am, my dear Sir, | Yours very truly | G.B. Airy

Professor Faraday