General Information

Serial #

N/A

Part Number

7

Total Parts

15

AKA

N/A

Patents

N/A

General Description

GLASS & METAL/ GASES

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

14.6 cm

Width

2.3 cm

Height

N/A

Thickness

2.2 cm

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Chemistry

Category

Demonstration & teaching equipment

Sub-Category

N/A

Manufacturer

AKA

Dunscombe

Country

England

State/Province

Unknown

City

Bristol

Context

Country

Worldwide

State/Province

Ontario

Period

LAST HALF OF 19TH CENTURY

Canada

GEISSLER & CROOKES TUBES WERE STANDARD EQUIPMENT IN PUBLIC & UNIVERSITYELECTRICAL DEMONSTRATIONS IN LAST HALF OF 19TH CENTURY IN CANADA & ELSEWHERE.

Function

SET OF EVACUATED GLASS TUBES FILLED WITH CONDUCTING GASES & WITH EMBEDDED ELECTRODES, SO THAT TUBES GLOW WHEN ELECTRIC CURRENT IS PASSED THROUGH THEM, USED TO DEMONSTRATE PHENOMENON OF FLUORESCENCE.

Technical

EXAMPLE OF EQUIPMENT USED TO ILLUSTRATE PROPERTIES OF CERTAIN GASES IN RELATION TO ELECTRICITY, ESP. FLUORESCENCE. WORK WITH GEISSLER TUBES LED TO DISCOVERY OF CATHODE RAYS; WILLIAM CROOKES INVESTIGATED HOW THEY WERE AFFECTED BY MAGNETIC FIELDS, WHICH EVENTUALLY LED TO TECHNOLOGY OF CATHODE RAY TUBES USED IN TELEVISIONS.

Area Notes

Unknown

Details

Markings

NONE

Missing

From CA of 12/10/2001 by David Daley: Undetermined - appears to be

Finish

COLOURLESS & TRANSPARENT GLASS TUBES

Decoration

N/A