George Biddell Airy to Faraday   15 March 1855

Royal Observatory Greenwich | 1855 March 15

My dear Sir

You may perhaps remember that I troubled you a little while ago about some galvanic currents that disturbed us¹. - Upon mapping the wires and studying the connexions, we found that there was a connexion with a Battery not duly considered: and upon examining the Battery we suspected imperfect insulation. So I have mounted the Battery upon potted-meat-pots surmounted by inverted saucers, and all the strange currents have ceased. And so ends that Great Mystery.

That imperfect insulation is an odd thing. I wonder why the power of the battery did not go off in full force.

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

Professor Faraday