Object Name
Bob, Plumb
Materials
Wood --Fiber --Metal
Catalogue Number
99-02.45
Dimensions
Reel: Length 16.2cm x Width 8.5cm x Height 1.8cm
Plumb Bob: Length 8.3cm x Width/Diameter 4.0cm
Description
This item consists of a wooden reel (a), a thin rope chalk line, and a metal plumb bob weight (b). The wooden reel is thin and Y shaped on either end, with the rope line wrapped around the length of the reel. Attached to the line is a small dark coloured metal plumb bob that is cone-shaped.
History
A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum. It is typically made of lead, stone or wood but can also be made of metal.
