The Davey Institute of Tree Surgery Instruction Books One, Two, Three, Four, Five, and Six with Examination Questions: Trees as Living Bodies; Tree Structures; Tree Activities; Agencies Which Destroy Trees; Correct Tree Pruning; Principles of Cavity Trea…

Six volumes in printed wrappers with stapled bindings. Black-and-white photographic illustrations. 16; 23; 23; 23; 32; 19 pp. The Davey Institute of Tree Surgery, now simply called The Davey Institute, was established in 1880 by John Davey, now known as the Father of Tree Surgery. Davey pioneered the idea that tree health could be managed in ways similar to human health. The company still exists today, and is dedicated to plant health care and sustainability. It is one of the largest employee-owned companies in the United States.