Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 47
Fig. 53. Fi£b §2! To Find the Center of a Given Arc ABC.—Draw the chords AB and CD and bisect them. Extendthe bisection lines to intersect in D the center required. GEOMETRICAL DRAWING. 33 Figb* 53. To Draw a Line Tangent to an Arc of aCIRCLE.—(ist.) When the center is not accessible. Let Bbe the…
