Bob, plumb

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Ingenium, 1980.0678.001
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OBJECT TYPE
N/A
DATE
1701–1800
ARTIFACT NUMBER
1980.0678.001
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
14.4 cm
Width
2.3 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
Pendant with onion shaped top . Body decorated with incised vertical lines.

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If you choose to share our information about this collection object, please cite:

Unknown Manufacturer, Bob, plumb, between 1701–1800, Artifact no. 1980.0678, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1980.0678.001/

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