. 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., ?.- A38765432 1 Q [ Z Z4 56 78 9c 52 PEACTICAL EULES PIPES To describe a Pattern for a T Pipe^ the Collar to heSmaller than the Main Pipe. Pig. AI2 3 4- 6 7 &q|OS Let the circle OH, f
. 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., ?.- A38765432 1 Q [ Z Z4 56 78 9c 52 PEACTICAL EULES PIPES To describe a Pattern for a T Pipe^ the Collar to heSmaller than the Main Pipe. Pig. AI2 3 4- 6 7 &q|OS Let the circle OH, fig. 51, equal the large pipe, AB, CD, theBranch or Collar; describe the semicircle AEB ; divide the semi-circle into any number of equal parts; from the points, drawlines parallel to AC, as 1, 2, 3, &c. FOB DESCRIBING PATTERNS. 53 Pig. 52. TC C9<M CQto *?li» 03 Set oflF the line ABC, fig. 52, equal in length to the circumfer-ence of the Collar AB ; erect the perpendicular lines AD, BE andCF; set off on each of BE, the same number of equal distances aain the semicircle ; from the points draw lines parallel to BE, a31, 1, 2, 2, &c. ; make AD, BE and CF equal to AC and BD; also,each of the parallel lines bearing the same figures as 1, 1, 2, 2,3, 3, &c., then a line traced through the points will form the pav-tern. Edges to be allowed. 54 PRACTICAL RULES PIPES. To describe a Pattern for a T Pipe at any angle^ theCollar to be Smaller than the Jlahi Pipe, Fig. 53,
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Keywords: ., bookcentury18, bookdecade1870, booksubjectmetalwork, bookyear1876
