Manufacturing of Turpentine
“The first step is to obtain the crude turpentine. It is a mixture of the essential oil known as spirits of turpentine and resin. A half-moon shaped box is cut in the trees, as near as possible to the surface of the ground.” -Lupton This is shown in the illustration.
GalleriesOil and Turpentine Industries
F.M Lupton The Popular Cyclopeadia of Useful Knowledge (New York, NY: F.M Lupton, 1888)