Fred T. Hodgson · Frederick J. Drake and Co. · leaf 228
ecripples at the junction of the major and minor diam-eters. Templates for Running Elliptical Mouldings.—Thetrue form of an ellipsis can only be derived from the METHODS OF WOEK diagonal cut from the cone or the cylinder, and the near-est approximation to this curve must be obtained bycontinuous… … Template and Pin-Mould for Running Elliptical Arch Mouldings,no. 20. half the shortest or minor diameter of the ellipsis, andfrom the centre pin to the outer pin equal to half thelongest or major diameter. This shows the use of atrammel for setting out the lines to make a template forthis form of…
