A field of great importance is the relation between the physical structure and the mechanical properties of wood. A student should inform himself concerning the standard methods of testing the properties of structural timber, by bending, compression, shearing, torsion, impact, and the hardness and tension tests, with their relation to heat and moisture, and the methods of seasoning, the use of preservatives, and the effect of the rate of application of the load.
Woods vary as to their durability. It is important, therefore, to know about the causes of decay, the decay-resisting power of various woods, the relation of moisture content to durability, why the seasoning of wood is effective, the theory and the commercial methods of wood preservation, and its relation to the timber supply.
Lumbering the Forester should know more than a little about, as how to organize lumber operations, the equipment and management of logging and milling in various forest regions, the manufacture, seasoning, and grading of the rough and finished lumber, cost keeping in a lumber business, methods of sale, market requirements at home and abroad, prices, the relation of the lumber tariff to forestry, lumber associations, timber bonds, and insurance. The practical construction of logging equipment, such as aerial tramways, log slides, dams, and flumes, is of peculiar importance, and so are the conditions and changes of the lumber market.
Experience on the land of some operating lumber company is of great value. It should include a study of logging methods, log scaling, waste in logging, the equipment and handling of the mill, the sawing and care of rough and finished lumber, its grading, and so far as possible an acquaintance with wood working plants of various kinds, and with the operations of turpentine orcharding. Studies along these lines may with advantage be almost indefinitely extended to include, for example the utilization of steam machinery for logging, the improvement of streams for driving logs, and other similar questions.
The Forester must have at least a slight acquaintance with forest law, both State and National. It is important to know something of the general principles of classifying the public lands, of State laws for fire protection, the development of forest policies in the various States as legally expressed, and the important laws which govern the creation and management of State forest reserves.