SAMUEL F. B. MORSE - AUTOGRAPH LETTER SIGNED 02/22/1871 - HFSID 350580 - HFSID 350580

SAMUEL F.B. MORSE Signed autograph letter (1871) to an experimenter, in which Morse discusses "the present Science of Electro-Magnetism." ALS: "Saml F.B. Morse". 1½ pages, 5 x 8, front and verso. New York, 1871 February 22. The inventor of the Morse Code and the Electromagnetic Telegraph writes to G.W. Varnum, M.D., Montgomery City, Mo. In full: "I received yesterday through my friend & your Cousin J.B. Varnum, Esq your letter of the 16t. instant. In regard to the experiment mentioned in your letter, it is by no means new. Indeed it was from observing this effect, upon a needle, of the magnetism of an electric current (not indeed upon the modern electromagnet, which was the result of his observation,) that Oersted founded the present Science of Electro-magnetism. The use made also of this effect of the magnet upon the needle, to indicate the presence of an electric current upon the telegraph wires, is almost universal in the Offices in Europe; every instrument being furnished with a Galvanometer for the purpose, So although although (sic) not new, you have at least the satisfaction of having independently Suggested a valuable use of the magnetic needle.
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