[D8238ZCI], Letter from Charles Batchelor to Thomas Alva Edison, August 22nd, 1882
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Title
[D8238ZCI], Letter from Charles Batchelor to Thomas Alva Edison, August 22nd, 1882
Editor's Notes
"Ever since the Exhibition I have thought of using the Deprez galvanometer for testing lamps. I have had mirrors fixed on them and we find absolutely no difference between them and the thomson galvanometer in point of accuracy. The spot goes right to its place instantaneously and you can test very quick. I have had one working for Electo M.F. now for the last week and every lamp has also been tested by Thomson & electro dynamometer and it has not changed at all. PS When Roland was here he ran this down as an unscientific instrument but I find it eminently *practical*. TAE marg: "Send immediately Deprez galvanometer one for current one for volts. Edison."
Author
Recipient
Date
1882-08-22
Type
Folder/Volume ID
D8238-F
Microfilm ID
62:463
Document ID
D8238ZCI
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University