. 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., Describe a circle one inch larger in diameter than the hoopafter the edge is h;id off; lay the hoop on the pkte, allowing anedge each side, as shown by the diitance between the two circles
. 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., Describe a circle one inch larger in diameter than the hoopafter the edge is h;id off; lay the hoop on the pkte, allowing anedge each side, as shown by the diitance between the two circlesand tbe dot on the line AG, the circle DE representing the hoop :take the distance from A to the dot on the lino AO, and set offthree times the distance on the outer circle, as from A to B; drawthe lines AC and BO, cutting the centre at 0. Edges to ibc allowed. ^ .;\f,Vt/\>f PRACTICAL EULES C>iAn OVAL. To describe an Ellipse or Oval, having one TwoDiameters On the intersection of the two diameters as a centre, with aradius equal to one-half the difference of the two diameters, de-scribe the arc AB, and from B as a centre, with half the chordACB, describe the arc CD ; from E as a centre with the distanceED cut the diameters at FF and DD ; draw the lines FO, FO, FO,FO ; then from F and F as centres, describe the arcs 00, and 00 ;also, from D and D as centres, describe the smaller arcs, 00 and00, which will complete the ellipse as required. FOR DESCRIBING PATTERNS.
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Keywords: ., bookcentury18, bookdecade1870, booksubjectmetalwork, bookyear1876
