[D8639M], Letter from S K Dingle to Thomas Alva Edison, May 29th, 1886


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[D8639M], Letter from S K Dingle to Thomas Alva Edison, May 29th, 1886

Editor's Notes

Dr. Crowell directed me to write. Rudd has gone home to Evanston to spend Sunday with family so won't write till Monday if he hasn't already. We both keep a diary of experiments on railroad telegraphy. Have not written before because Rudd is senior, "the man of brains," so his comments are "the more valuable." Wire scheme [See D8639I] no better than roofs from the train and not as good to the train. [Gives detailed explanation of experiments on trains of five and six cars] Have a train of five cars and in the morning have another car hauled from Milwaukee to Chicago. Cut condensers in around keys and relays south of Wadsworth to Morton. Rudd's diary says the work on the section south of Wadsworth "was better than usual." Battery gave out before tests completed, waiting for fluid, should resume Monday.###Made some experiments with diaphrams, seemed promising, but couldn't get thin enough metal from Chicago. Glad you've taken up subject of receivers since little done for us in that line; "the original little Jones bought by Gilliland" are the best on the train, and the long Bell Phone used by Rudd was picked up and used as is.###Induction disturbance here is even worse than at Staten Island--"regular sledge hammer thumps."###Distance between the wires and the track seems the greatest difficulty. [Gives detailed explanation]###Doctor hasn't pressed the reduction of salary hence there is little "prospect of seeing a certain young person down at Staten Island for a month or two."





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