nitrogen spectrum tube
Date1920-1940
Inventory Number1997-1-1350
ClassificationDischarge Tube
Subject
Supplier
Central Scientific Company
1889 - 2000
Cultural Region
Place of Origin
Dimensionscase: 28.5 x 4.7 x 4.7 cm (11 1/4 x 1 7/8 x 1 7/8 in.)
Material
Accessoriescylindrical cardboard case
DescriptionA glass tube consisting of two cylindrical sections connected by a narrow tube. Each of the two section has an electrode connected to its outer end, with a brass-colored cap on its outside, and extending a few inches into the tube as a metal cylinder. Both cylinders are somewhat darkened by use. It is stored in its original case.
Signedsticker on cardboard case: 87240 / SPECTRUM TUBE / Glass Nitrogen gas / CENTRAL SCIENTIFIC COMPANY / SCIENTIFIC APPARATUS / BOSTON - CHICAGO - TORONTO / NEW YORK - SAN FRANCISCO - LOS ANGELES - MONTREAL / J50
FunctionWhen its electrodes are connected to a large voltage, this tube generates light of a specific color that corresponds to the emission spectrum of nitrogen.
