From the twin-screw oscillating engine to the suspended foot treadle and beyond, this captivating anthology of early-twentieth-century mechanical devices covers it all. Over 1,800 detailed illustrations-including diagrams and cross-sections-accompany each entry, further illuminating the mechanical workings of a diverse range of devices and appliances. The clear and concise entries are organized by type, including sections on mechanical power, steam power, motive power, hydraulic power, electrical power, and air power, as well as chapters devoted to timekeeping and navigational devices; mining, milling, and construction devices; and a final chapter on miscellaneous devices that defy classification.