19. Park Crescent,
Portland Place. W. <1>
June 25. 1866
My dear Sir
I am making some experiments in Electro-magnetism, and the large circular flat Electro-magnet made for my Patent of 1841 <2> would be very useful to me to verify some of the results. If it be still in your possession I will ask you to lend it to me, and it shall be returned whenever you wish it.
Yours very truly
C. Wheatstone
H. F. Talbot EsqrNotes:
1. London.
2. Wheatstone’s Patent No. 9022, for Producing, Regulating and Applying electric currents was granted 7 July 1841.