, pro-rating, gauging, ex-change and the conversion of weights and measures. It will be found useful to the Engineer, Architect, Actuary, Scientist,Manufacturer, Mechanic, Navigator and Accountant. A book containing a full description of the instrument, all thenecessary rules for operating it, and… … 1742. 1742. Fullers Spiral Slide Rule, in mahogany box, each, ^28.00 Fullers Spiral Slide Rule consists of a cylinder which can be moved upor down and turned round a sleeve which is attached to the handle.A single logarithmic scale, 42 feet long, i.s wound round the cylinderspirally, and ratios are…
