. 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., FOR DESCRIBING PATTERNS. 11. 12 rnAcncAL eules OVAL. To describe a Pattern for a Taperinrj Oval artidf,^to he in two Sections. Describe the bottom, the length and breadth required as in fi
. 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., FOR DESCRIBING PATTERNS. 11. 12 rnAcncAL eules OVAL. To describe a Pattern for a Taperinrj Oval artidf,^to he in two Sections. Describe the bottom, the length and breadth required as in fig,8, then describe the body as in fig. 9 and 10. Describe the right angle ABO, fig. 9; make BE the altitude,draw the line DE at right angle to BO ; make DE equal to AB infig. 8 ; make AB equal to DE and the taper required on a side,draw a line cutting the points A and D, and the line BO. On any right line, as AB in fig. 10, with the radius CD and CA,describe the arcs EF and CD, set off EF equal to FBE in fig. 8 ;draw the lines CE and DF, cutting the centre at B. Fig. 9, make GE equal to CD in fig. 8 ; make FB equal to GE,and the taper required on a side, draw a line cutting the points Fand G, and the line BC, with the nidius EG, and in fig. 10, E andF as centres, cut the lines CB and DB, as at L and M, with L andM as centres describe the arcs FK and EH; also, the arcs DI andCG ; set off FK and EH, equal to ED in fig. 8 ; draw th
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Keywords: ., bookcentury18, bookdecade1870, booksubjectmetalwork, bookyear1876
