Univ. Coll. | 1st Nov
My dear Sir
I am told that you have had occasion to see and test an apparatus analogous to Dubosq’s for regulating the distance of the carbon points, and that you consider the apparatus superior in simplicity & efficiency to Dubosq’s. Beyond this my informant can tell me nothing about the new apparatus. I should therefore feel very greatly obliged by your giving me any particulars or conclusions regarding it & informing me of the name of the inventor or some clue to a further knowledge of the apparatus. I am sadly in want of some means of getting regularity in the electric light - & am not disposed to venture in Dubosq’s expensive & uncertain instrument.
Yours very truly | Alexd. W. Williamson
Watermark: 1854
Please cite as “Faraday4745u,” in Ɛpsilon: The Michael Faraday Collection accessed on