The theory and practice of gauging, [electronic resource] : demonstrated in a short and easy method. Containing, among other Particulars, The Method of Computing Decimally; extracting the Square Root, with the Construction and Use of the Sliding-Rule explain'd at large. The Elementary Properties of the Conic Sections, and the Manner of describing them in Plano. General Principles of Mensuration, with Theorems for Measuring all right-lin'd Planes, Parallelopipedons, Prismatic Solids, the Conic Sections, Conoids, Spindles, their Segments, and Frustums, &c. A General Proposition for measuring the Hoofs or Ungula's of any Cone or Pyramid; and a new Method for Measuring by Approximation. With the Application of the preceeding Principles to Practice; and illustrated throughout by particular Examples. Published with the particular Approbation of the Honourable Commissioners of Excise. Design'd for the Use of the Officers of that Revenue. By Robert Shirtcliffe.