George Biddell Airy to Faraday   23 August 1859

1859 August 23

My dear Sir

Thank you for the very clear instructions in your letter of 20th¹, which will be taken by me as basis of my operation for adjustment of the pendulum of the Observatory Motor Clock - the Primary Clock of British Time.

The adjustment in question is not unimportant, for upon the successful management of it depends the possibility of extending the system of making the Primary Clock to regulate numerous clocks, which in succession will regulate more numerous clocks.

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

Professor Faraday