Bob, plumb
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1980.0675.001
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- OBJECT TYPE
- N/A
- DATE
- 1701–1800
- ARTIFACT NUMBER
- 1980.0675.001
- MANUFACTURER
- Unknown
- MODEL
- Unknown
- LOCATION
- Unknown
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- Bronze.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 19.2 cm
- Width
- 2.8 cm
- Height
- N/A
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Exploration and Survey
- Category
- Survey equipment
- Sub-Category
- N/A
Manufacturer
- AKA
- Unknown
- Country
- Unknown
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Part of the George Petrovic Collection of Scientific Instruments. George Petrovic was born in Yugoslavia and lived in Serbia and Montreal. Dr. Petrovic studied, practised, and taught architecture, held a doctorate in technical science, and was a member of the International Committee for Historical Metrology, in Basil, Switzerland. The collection of tools, which is international in scope and importance, includes rules, compasses, plumb bobs, levels and dividers that date from the 12th to the 20th centuries. This collection provides a base for research in the science of measurement and a context for measuring tools used both in and outside of Canada. - Function
-
Suspended from an instrument by means of a line, a plumb bob is used to determine the instrument's vertical centre or perpendicularity. - Technical
-
The plumb bob has remained relatively unchanged since antiquity. Though it can be made out of different materials and its shape may vary, the principle remains the same: a symmetrical weight is suspended from its broad end on a cord or a chain. One notable change to plumb bobs came during the industrial revolution, when the development of metal lathes allowed metal bobs to be more symmetrical, smooth, and aerodynamic. This artifact is an example of a plumb bob that has not been machined on a metal lathe. - Area Notes
-
Unknown
Details
- Markings
- None.
- Missing
- None
- Finish
- Unknown
- Decoration
- Eight sided pendant with square top.
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Unknown Manufacturer, Bob, plumb, between 1701–1800, Artifact no. 1980.0675, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1980.0675.001/
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