Brunton Pocket Transit, 1960s
First patented in 1894, the pocket transit is a relatively simple instrument which provides horizontal and vertical readings; it has adjustable sights and also can function as a plumb bob. The pocket transit is commonly used in geologic mapping, surveying and claim staking. Although the basic design of the Brunton is the same today as when it was first patented, the instrument has undergone changes through the decades, such as the addition of a second bubble and improvements to the sighting arm. Manufactured by William Ainsworth & Sons, Denver, Colorado.
Object ID: USGS-000741