[D8830AAC], Letter from John H Vail to Thomas Alva Edison, February 3rd, 1888


View document with UniversalViewer   → View document on Archive.org  → Re-use this digital object via a IIIF manifest


[D8830AAC], Letter from John H Vail to Thomas Alva Edison, February 3rd, 1888

Editor's Notes

"For the past three years I have endeavored to make up for the benefit of the Light Company and for our Central Station Companies, tables or statistics, which would give reliable data as to the cost of producing current in our central stations. ### While I have many different points in the cost of operating stations, all of which are reduced to a basis of dollars and cents, there is one feature which I find necessary to make this data accurate, and that is that we have an instrument which will record the amperes and volts of a station day by day. ### In looking over all the data which I can gather together, and endeavoring to make it of value, I ran against this one requirement as against a stone wall. ### You will recall to mind that I have mentioned the need of a recording ampere and volt meter to you once or twice in the past; also, that you stated such an instrument had been made and tried. ### I followed up the instrument which was said to have been sent to the Pearl Street Station, but after tracing up every clew possible, could not discover where it was. If you can find the time to take this matter up, I feel that if a successful instrument is produced, it will be of vast benefit to our central station business. It seems to me the only missing link which we need in determining the economy of our stations." [TAE marginalia: "I have a recoridng Voltmeter but never gave it a test will attend to it."] [TAE marg: " John Ott set that Volt Recorder up & have somebody work at it. Edison"]






Folder/Volume ID


Microfilm ID


Document ID



Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Download CSV | JSON