Electroscope
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1998.0233.001
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- OBJECT TYPE
- GOLD LEAF CHARGE
- DATE
- 1900–1925
- ARTIFACT NUMBER
- 1998.0233.001
- MANUFACTURER
- Denver Fire Clay Co.
- MODEL
- Unknown
- LOCATION
- Denver, Colorado, United States of America
More Information
General Information
- Serial #
- B 1015
- Part Number
- 1
- Total Parts
- 2
- AKA
- N/A
- Patents
- N/A
- General Description
- .1 METALS, INCLUDING BRASS AND NICKEL; GLASS; WOODEN BASE/.2 SYNTHETIC
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 15.3 cm
- Width
- 15.1 cm
- Height
- 23.0 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Physics
- Category
- Demonstration & teaching equipment
- Sub-Category
- N/A
Manufacturer
- AKA
- Denver
- Country
- United States of America
- State/Province
- Colorado
- City
- Denver
Context
- Country
- Canada
- State/Province
- Ontario
- Period
- THIS INSTRUMENT PROBABLY USED C. 1900 TO 1925, AND POSSIBLY LATER.
- Canada
-
PART OF A COLLECTION OF PHYSICS LABORATORY AND CLASSROOM DEMONSTRATION APPARATUS FROM MCMASTER UNIVERSITY. THIS PIECE IS ASSOCIATED WITH HARRY THODE, A CHEMISTRY PROFESSOR WHO WORKED ON CANADIAN NUCLEAR PROJECTS DURING AND FOLLOWING WW11. HE BECAME ONE OF CANADA'S LEADING NUCLEAR SCIENTISTS. (REF.1) - Function
-
TO DEMONSTRATE AND MEASURE THE RELATIVE RADIOACTIVITY OF A RADIUM OR SIMILAR SAMPLES. - Technical
-
AS AN ATOMIC PARTICLE PASSED THROUGH THE ELECTROSCOPE, IT WOULD CAUSE ATOMS TO BE STRIPPED OFF THE GOLD LEAVES SUSPENDED IN THE CHAMBER, RENDERING THEM SLIGHTLY CHARGED. THE GOLD LEAVES SEPARATED BY AN AMOUNT ROUGHLY PROPORTIONAL TO THE CHARGE THAT HAD BEEN BUILT UP. HUMIDITY PERMITTED THE CHARGE TO LEAK OFF THE LEAVES SO THE PRECISION WAS DECREASED. THIS EXAMPLE PROVIDES MORE SHIELDING AND CONTROL OF THE ENVIRONMENT OF THE GOLD LEAVES (REF. 1), AND OF THE SAMPLE. IN USE, THE RADIOACTIVITY OF A SUBSTANCE IS MEASURED BY THE RATE AT WHICH THE LEAF TRAVELS OVER THE SCALE DUE TO THE IONIZATION PRODUCED BY THE SUBSTANCE (REF.2). - Area Notes
-
Unknown
Details
- Markings
- " B. 1015 " incised on sample chamber casing. Plate fixed to wooden base reads " THE DENVER FIRE CLAY CO./ SCIENTIFIC APPARATUS/ logo- DFC/ CHEMICALS, GLASSWARE/ DENVER SALT LAKE ".
- Missing
- UNKNOWN. PROBABLY MISSING SAMPLE DISHES/TRAYS FOR LOWER COMPARTMENT. From CA of 11/29/2001 by Matthew Bruce: No - appears complete
- Finish
- .1 SAMPLE CASING CHAMBER IS NICKEL PLATED. WOODEN BASE IS STAINED AND VARNISHED..2 CLEAR SYNTHETIC DISK
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Denver Fire Clay Co., Electroscope, circa 1900–1925, Artifact no. 1998.0233, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1998.0233.001/
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