A practical workshop companion for tin, sheet iron and copper plate workers : containing rules for describing various kinds of patterns used by tin, sheet iron and copper plate workers : practical geometry, mensuration of surfaces and solids, tables of the weights of metals, lead pipe, etc., tables of areas and circumferences of circles : japans, varnishes, lackers, cements, compositions, etc., etc., etc. (1876)
Blinn, Leroy J · Philadelphia : Henry Carey Baird & Co. · leaf 92
nes as in the points I and K, and bisect IK as in Lfrom L, as a centre, draw a circle cutting the ellipse in four poins,1,2,3,4, now L is the centre of the ellipse ; but join the points 1,8, and 2,4 ; and bisect these lines as in M and N; draw the lineMN, and produce it to A and B, and it will be… … Multiply the slant height by one-half the diameter of the largeend, and divide the product by one-half the difference of the twoends, and the quotent is the radius; the versed sine is found bymultiplying the altitude by one-half the diameter of the largeend; and dividing the product by one-half the…
Metal-work · Workshop recipes
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
