A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop (1904)
Blinn, Leroy J. [from old catalog] · Philadelphia, H. C. Baird & co. · leaf 49
ect BC in E and draw EE perpendicular toBC and equal to EE (Fig. s^)- Through E draw BCparallel to BC ; make EC and E B each equal to half thelength of the top edge of the BC face, through C and Bdraw CD and BA parallel to CD and BA; make CDand BA each equal to B C; join DA, also AA, BB,CC and DD;… … Pig- 37-Pyramid, the Plan oftJie Frustum and its Height being given.—Let ABCDDABC (Fig. 37) be the plan of the frus-tum. From any point E in BC draw EE perpendicularto BC and BC of the frustum. Draw EE perpendic-ular to EE and equal to the height (which either is OVAL. ^ given or can be found as in…
Metal-work
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