London: Charles Griffin & Co. 1908. First Edition. Very Good Condition. Item #232404
An original and complete logarithmic calculator, or Computer, designed for solving the "numerous problems connected with the power, size and speed of steam engines of all kinds". The calculator has four parts, fastened with a brass rivet, each with a printed scale, which rotate and line up to allow the reading of pipe diameters, the stroke of pistons, cylinder diameters, the BHP of an engine, the IHP of an engine, and all manner of engine design requirements. Together with the 12 page pamphlet of instructions, tissue guard, all in fairly splendid condition with only minimal wear, and the original (worn) outer box. Quantity Available: 1. Category: Antiquarian & Rare; Engineering; Featured; Collectables. Inventory No: 232404.