[D8503ZAB1], Letter from Henry Smith Craven to Thomas Alva Edison, April 4th, 1885
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Title
[D8503ZAB1], Letter from Henry Smith Craven to Thomas Alva Edison, April 4th, 1885
Editor's Notes
letter about working light by for underground surveys TAE marg is formal reply LB020234: Dear Sir= We manufacture one candle Lamps at our factory & I am at the present moment expmtg to get a suitable battery to be carried on the person-- I intended it for coal miners but it will undoubtedly suit your purpose I expect to have it within a month & will let you know when ready [overstruck line] A plumb line of fine platina wire could be rendered visible if you had a Dynamo or electric Light plant at top of shaft & were run in parallel It takes a great deal of power perhaps by using large cord painted with Luminous paint & putting piece of magnesium wire for instance would give light enough the light would last 1/2 to 1 hour & illuminate dark would shine out plain & distinct
Author
Recipient
Date
1885-04-04
Type
Subject
Folder/Volume ID
D8503-F
Microfilm ID
77:70
Document ID
D8503ZAB1
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University