Elementary principles of carpentry : a treatise on the pressure and equilibrium of timber framing, the resistance of timber, and the construction of floors, centres, bridges, roofs, etc.,; with practical rules and examples, and numerous tables of the scantlings of timber for different purposes, the specific gravities of materials ;to which is added an essay on the nature and properties of timber including the methods of seasoning, and the causes and prevention of decay, with descriptions of the kinds of wood used in building / by Thomas Tredgold with an appendix of specimens of various roofs of iron and stone ;by E. Wyndham Tarn.