. 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., Erect the perpendicular line EF equal to the Slant height ofthe articles; draw the line AB at right angle to EF; draw theline CD parallel to AB ; make AB equal in length to one side ofthe
. 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., Erect the perpendicular line EF equal to the Slant height ofthe articles; draw the line AB at right angle to EF; draw theline CD parallel to AB ; make AB equal in length to one side ofthe base ; malie CD equal in length to one side of the top orsmallest end; draw the lines AG and BD, 0 and D as centres,with a radii equal to one-half the difference of the two ends, asfrom B to G ; describe the arcs I and 11; draw the right anglelines lAJ and HBK; set off JA and KB equal to FB, and drawthe lines JL and KM at right angles to JA and KB; also, thelines LC and MD at right angles to LJ and MK. Edges to be allowed. FOR DESCRIBING PATTERNS. 81 SQUARE BASE WITH A CIRCULAR TOP. To describe a Pattern for Tapering article^ the Baseto he Square^ and the Top a Circle to be in twoSections. Pig. Erect the perpendicular line NF ; draw the line AB at rightangle to NF ; make EF equal to the Slant height, and draw theline CD parallel to AB; make a AB equal in length to one sideof the base; make CD equal in length to one-fourth the circum-ference of the top, and draw the lines AC and BD, C and D ascentres, with a radii equal to one-half the difference of the twoends; describe the arcs I and H, draw the right angle lines lAJand HBK; set off JA and KB equal to FB, and draw the lines JNand KN at right angles to JA and KB, N as a centre with theradii NE describe the arc LEM. Edges to be allowed. 32 PRACTICAL EULES RECTANGLE BASE WITH A SQUARE TOP. To describe a Pattern for a Tapering article, theBase to he a Bectangle, and the Top Square, to bein Two Sections. Erect the perpendicula
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Keywords: ., bookcentury18, bookdecade1870, booksubjectmetalwork, bookyear1876
