Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 605
ons in e li to meet those others successively. The inter-sections so found are points in the curve, which may beFig. 1440. traced accordingly. The cavetto is described like the Roman ovolo—bycircular arcs, as shown in Figs. 1441 and 1442. Sometimes it is composed oftwo circular arcs united (Fig.… … AriCHITECTURAL CONSTRUCTIOX. 589 draw the horizontal line oj^ meeting ej)^ on p describe the arc io to completethe curve. The ogee, or cyma recta (Fig. 1444), is compounded of a concave and a con-vex surface. Join a and h, the extremities of the curve, and bisect ab at c; ona and c, as centres,…
Mechanical drawing
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