[D8828AAF], Letter from Joseph Wetzler, Electrical World to Thomas Alva Edison, January 28th, 1888

Item

Abstract

"Knowing that you have made a large number of experiments on platinum and iridium wires, we would be obliged to you if you would inform us with regard to the following points upon which a correspondent has addressed an inquiry to us. ### 1. Whether iridium wire will crack when brought to incandescence in the atmosphere or in the presence of hydrogen gas, as has been found to be the case with platinum wires. ### 2. Whehter platinum wire tempered by your process retains its qualities when again exposed to the atmosphere. ### Thanking you in advance for your kind attention, I remain," Yours truly Jos. Wetzler. [Marginalia: "Ans Jan 30/88" and referencing question 1: "They cannot make iridum wire if it is brittle metal, a 20 pct iridium with platinum is however made. This is harder than platinum--All these metals crack when heated--If brought up by my old process tey do not crack and are elastic at a white incadescence don't know how they will stand in air"]

Date

1888-01-28

Decade

1880-1889

Type

Identifier

D8828AAF

Folder Set

D8828

Title

[D8828AAF], Letter from Joseph Wetzler, Electrical World to Thomas Alva Edison, January 28th, 1888

Microfilm ID

122:759

Publisher

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