Josiah Latimer Clark to Faraday   31 October 1853

The Electric Telegraph Company | (Incorporated 1846) | Engineer’s Office, | 448, West Strand, | London, 31 Octr. 1853.

Dear Sir,

I return you the notes you were so kind as to lend me, with many thanks for their perusal. I have taken the liberty to enclose a list of corrections on some points on which you were not rightly informed, and a diagram of the sending apparatus used in some of the Experiments¹.

I find we get a return charge quite sensible to the tongue from a coil of 100 yards of gutta percha wire covered with lead. I even reduced the Experiment so far as to receive a perceptible charge from 10 feet of percha wire in a tumbler of Acidulated Water, and lastly from a Leyden Jar. I have no doubt a Leyden battery would give a very perceptible charge.

I am determined to get evidences (if possible) of the disturbance of one wire by another, we ought to see it when [the] circuit is broken despite of imperfect insulation. I am making some careful experiments to demonstrate this last link of identity between Galvanic & frictional Electricity of which I will send you a full account & you can then if you wish see them repeated. If you would like a coil or two of wire to Experiment upon either lead covered or plain I have no doubt our people will be glad to send them to you. We are always anxious to further the objects of science in any way. I am anxious to try some delicate Electrometer Experiments about which I shall perhaps have an opportunity of speaking to you.

I remain | Yours very faithfully | Lat. Clark

M. Faraday Esq | Royal Institution