Carpentry made easy, or, The science and art of framing, on a new and improved system : with specific instructions for building balloon frames, barn frames, mill frames, warehouses, church spires, etc., comprising also a system of bridge building, with bills, estimates of cost, and valuable tables ...
A practical carpentry manual by William E. Bell, published in Philadelphia by Howard Challen in 1857 for builders framing houses, barns, mills, churches and bridges. The plates are line diagrams of roof trusses and bridge spans, labeled with letters and figure numbers, showing rafters, braces, king posts and joint details as flat geometric webs usable as technical linework.
