Carbon arc lamp rods, see http://www.webexhibits.org/causesofcolor/3A.html for background, still in use
-
Object number
1
-
Date made
1877 - 2010
-
Dimensions
Weight 9.8 gr
Length 3.5 inches
Width 0.44 inches
-
Color
Black
-
Category
-
Class
Stone
-
Material