. 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., ibe the bottom, the length and breadth required as in ; the body as in figs. 18 and 19; describe the right angleABC, fig. 18; make BE the altitude, draw the line DE at rightangle to
. 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., ibe the bottom, the length and breadth required as in ; the body as in figs. 18 and 19; describe the right angleABC, fig. 18; make BE the altitude, draw the line DE at rightangle to BC ; make DE equal to EC in fig. 1*7; make AB equalto DE and the taper required on a side, draw a line cutting thepoints A and D and the line BC. Fig. 19, make AD and BE equal to AD in fig. 18; makeABequal to AB in fig. 1*7; draw the lines DM and EN, fig. 18 withthe radii CD, and in fig. 19, A and B as centres, cut the lines DMand EN, as at M and N, with M and N as centres; describe thearcs BC and AI; also, the arcs EF and DH ; set off BC and AIequal to BC, in fig. 11; draw the lines HI and FC, cutting thecentres M and N. Draw the lines FG and CL at right angle teFN ; also, the line KH and JI at right angle to HM ; makeCL andJI equal to one-half off CD, in fig. 17, draw the lines KJ and GLat right angle to KH and FG. Edges to be allowed. The taper to be equal on all sides. 20 PRACTICAL BULKS Pig. f 1- V - J YOR DESCRIBING PATTERNS. 21 OVAL. To describe a Pattern for a Tapering Oval or Oblong article^ the sides to be Straight, one end tobe a Semi-circle, the other end to be Straight loithquarter Circle Corners, to be in Two Sections. Describe the bottom, the length and breadth required as in ; the body as in figs. 21 and 22; describe the right angle ABC,fig. 21: make BG the altitude, draw the line DG at right angle toBC: make DG equal to AF in fig 20; make AB equal to DG andthe taper required on a side, draw a line cutting the points A andD, and the line BG; make FG
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Keywords: ., bookcentury18, bookdecade1870, booksubjectmetalwork, bookyear1876
