Abney Level Handbook

This book teaches you everything about one of the most useful and lesser-known surveying instruments.

Invented in the 1870s, the Abney level grew popular in the 20th century and is still in use today by foresters, surveyors, geologists, and safety inspectors.

"Next to the compass, the Abney is probably the most essential and popular surveying instrument in use in the Forest Service."

It''s considered...