Holtz current direction tube
notes: label: Description (Brief)
content: Made of clear glass. For demonstrating the character of discharge produced by various high potential sources, such as induction coils, high voltage transformers, and highly charged condensers. The direction of the current flow in the discharge is indicated by the branch of the tube in which the glow appears. Consists of two parallel tubes, containing a series of funnel-shaped obstructions, and connected at the ends by short tubes to which the electrodes are connected. A direct current discharge will cause only one branch of the tube to glow, while an alternating current will cause both branches to glow. With an induction coil one branch will be more brilliantly lighted than the other. Marked "E3748" and "E4530" near one electrode.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Wellesley College
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0043.02
label: catalog number
content: 1981.0043.02
label: accession number
content: 1981.0043
objectType: label: Object Name
content: discharge tube
physicalDescription: label: Measurements
content: overall: 4.8 cm x 5.2 cm x 65.6 cm; 1 7/8 in x 2 1/16 in x 25 13/16 in