Lyon Playfair to Faraday   7 April 1848

6 Craigs Court Charing | Cross | 7th April / 48

My dear Sir

It has just struck me, you might possibly find useful in your lectures a magnet in addition to your own. If so, I have a very powerful one at your disposal. It has 2400 yards of wires, in four coils capable of being used separately or altogether. Its suspension power, I have not measured with any powerful battery, but with 12 of Daniells cells it exhibited extraordinary powers[.]

I do not know whether this will be useful to you in your lectures or for any Experiments. If so, I need not say, I should be exceedingly happy to make it subserve so useful a purpose[.]

I am very sincerely yours | Lyon Playfair

Prof. Faraday F.R.S. | &c &c