30 chapters of facts, drawings, charts, and "Rules of Thumb" for the workshop. Here are solutions for hundreds of problems encountered on the job. Many entries include not only the math but "Rules of Thumb" that can be used when you don't wish to fool with the calculator. Chapters include taps & threads, glue, clamps and pressure, shelf loads, story poles, motors and electricity, pulleys and speed, horsepower, and much more.