[LB063613], Letter from Thomas Alva Edison to Charles Summer Wirt, July 7th, 1899
https://edisondigital.rutgers.edu/document/LB063613
Transcription
July 7th, 1899. Mr. Charles Wirt, 1026 Filbert St., Philadelphia, Pa. My Dear Sir:- I beg to acknowledge to send me a 12, 50 step rheostat with maximum capacity of 400 watts, and in reply, beg to state that I could use a rheostat at present on my storage battery work which is low voltage. Would like total resistance 8 ohms, and to have resistance between steps vary from about 1 ohm for the last step to about .10 ohm on step next to short circuit. Would like total resistance 8 ohms, and to have resistance between steps vary from about 1 ohm for the last step to about .10 ohm on step next to short circuit. Would also like 20 amperes capacity at first part of the resistance, and as much as you can let us have when resistance is all in. If you cannot meet these conditions, please let me know how near you can come to it. Again thanking you for your kind offer, I am Yours very truly.