[D8503ZAB1], Letter from Henry Smith Craven to Thomas Alva Edison, April 4th, 1885

Item

Abstract

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

Date

1885-04-04

Decade

1880-1889

Type

Identifier

D8503ZAB1

Folder Set

D8503

Title

[D8503ZAB1], Letter from Henry Smith Craven to Thomas Alva Edison, April 4th, 1885

Microfilm ID

77:70

Publisher

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