George Biddell Airy to Faraday   20 March 1857

1857 March 20

My dear Sir

This morning my Assistant came in in great alarm to tell me that the times of Magnetic Disturbance to which I adverted in my note¹ to you were Göttingen times and therefore exceeded Greenwich nominal times by about 40m and therefore made the Disturbance appear 40m later. In correcting the times of Disturbance for this, there is general simultaneity with the Telegraph disturbance.

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

Professor Faraday