In this ethnography Douglas Harper examines the working knowledge of a machinist with a small shop in upstate New York. Harper gives us this man's philosophy of work and shows how his work fits into the web of life in his community. In addition to fairly conventional auto and farm equipment repair, he rebuilds and creates new machines out of salvaged materials, drawing on his deep knowledge of these materials and how machines work. Harper's study addresses the large issues of the historical shift from the independent work of the medieval artisan to industrial production and the increasing automation of today. His ethnographic skills bring substance to his consideration of de-skilling, alienation and the rationalization of work in the contemporary world.