. Cyclopedia of architecture, carpentry, and building : a general reference work .... Fig. 86. length on similar line in Fig. 83. For the pattern take the dis-tance of 1 10 and place it as shown by 1 10 in Fig. 85. Using 1as center, and 1 2, Fig. 83, as radius, describe the arc 2 in Fig. 85;intersect it by an are struck from 10 as center and 10 2, Fig. 84,as radius. Then using 10 9 in Fig. 83 as radius, and 10, Fig. 85, as 159 88 SHEET METAL WORK center, describe the arc 9, and intersect it by an arc struck from 2as center, and 2 9, Fig. 84, as radius. Proceed in this mannerusing alternately a
. Cyclopedia of architecture, carpentry, and building : a general reference work .... Fig. 86. length on similar line in Fig. 83. For the pattern take the dis-tance of 1 10 and place it as shown by 1 10 in Fig. 85. Using 1as center, and 1 2, Fig. 83, as radius, describe the arc 2 in Fig. 85;intersect it by an are struck from 10 as center and 10 2, Fig. 84,as radius. Then using 10 9 in Fig. 83 as radius, and 10, Fig. 85, as 159 88 SHEET METAL WORK center, describe the arc 9, and intersect it by an arc struck from 2as center, and 2 9, Fig. 84, as radius. Proceed in this mannerusing alternately as radii, first the divisions in the half profile1 8 5, Fig. 83, then the length of the proper hypoteiiuse in , then the divisions in 6 8 10 in Fig. 83; then again the hypot-enuse in Fig. 84 until the line 5 6 in Fig. 85 has been obtained,which is equal to 5 6 in Fig. 83. Laps should be allowed forriveting and seaming as shown. C-K)
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