[LB031020], Letter from Thomas Alva Edison to Louis Glass, June 22nd, 1889


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[LB031020], Letter from Thomas Alva Edison to Louis Glass, June 22nd, 1889

Editor's Notes

I beg to confirm the following telegrams received from you and sent by me:-- THOS. A EDISON. June 20,1889 "Thought you had dynamo circuit till receipt of letter of fourteenth this morning; telegraph volts and amperes required for present phonograph, also whether you can supply dynamo and [cost] Louis Glass." LOUIS GLASS. June 21, 1889. "We can fill orders for phonos wound to run in multiple arc on hundred volt circuits. Singular battery wound motor requires two volts and two and half amperes. You can put thirty subscribers on wire in series; use a resistance and continuity preserving switch at each phono throw compensating resistance of seven-tenths ohm in circuits; when phono out of us phono plug need not be touched; add German silver coil at station to keep current construct. You can attach this to any incandescent circuit in City, or by using our smallest dynamo you can supply five such circuits. Lines may have a resistance of fifteen ohms or more with fewer subscribers. Our new battery has run phono 26 days four hours daily full speed and is great success. Price dynamo two hundred sixty. EDISON."





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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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