Glass manufacturer and dealer replies to TAE's re: glass breakage. Suggestions re glass purity & annealing. Use a second, unsealed outer bulb for weather protection. Marg: "Thank him for his information. Say that it is the heat of the wire passing through the glass that troubles us."

Van Gilder, John S

Edison, Thomas Alva

1880-01-23

1880-1889

Letter

Carbon, coal, glass, ceramics

Vacuum and glass bulb

D8020ZAM

D8020

[D8020ZAM], Letter from John S Van Gilder to Thomas Alva Edison, January 23rd, 1880

53:615

Thomas Edison National Historical Park

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