Name/Title
Plumb Bob and ReelDescription
Surveyors used this pointed brass weight with a red and white plastic case to establish a verticle line reference.
A plumb bob, also known as plumb bob level or plummet, is a tool used by surveyors, and many other industries such as construction, to establish a true vertical line reference. The bob, or metal weight, hangs from the retractable string in the red and white case, establishing a vertical level.
A counterpoint to the plumb bob is a spirit level which creates a horizontal line reference.Collection
Survey DepartmentLocation
Building
Building EOther
ODNR Headquarters