These documents, which date from 1886-1887, relate primarily to Alfred O. Tate's role in the development and marketing of Edison's system of phonoplex telegraphy. A letter from Tate to Edison describes progress in implementing this intermediate-distance induction-based system in Pennsylvania and Maryland. A circular letter from the Edison Phonoplex System, managed by Tate and Samuel Insull, encloses testimonials from satisfied railroad customers. There is also a letter written by Tate, in his capacity as Edison's private secretary, to the Fort Gratiot Methodist Episcopal Church.
[X001M7AA], Letter from Alfred Ord Tate to Thomas Alva Edison, April 10th, 1886 1886-04-10
[X001M7AB], Letter from Alfred Ord Tate to Richard Eades, June 23rd, 1887 1887-06-23
[X001M7AC], Letter from Alfred Ord Tate, Edison Phonoplex System, 1887 1887-00-00
[X001M7AD], Letter from Philadelphia and Reading Railroad Co, Oscar W Stager to Samuel Insull, December 4th, 1886 1886-12-04
[X001M7AE], Letter from Great Northwestern Telegraph Co (Canada), Harvey Prentice Dwight to Samuel Insull, February 2nd, 1887 1887-02-02
[X001M7AF], Letter from Richmond and Danville Railroad, Lehigh Valley Railroad Co, Jacob William Lattig to Alfred Ord Tate, February 9th, 1887 1887-02-09
[X001M7AG], Letter from Charles A Darlton, Richmond and Danville Railroad to Alfred Ord Tate, February 21st, 1887 1887-02-21