Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 74
GEOMETRICAL PROBLEMS. given circles; from tlie centres A, B, draw parallel radii A D, B E, inthe same direction; join D E, and produce it to meet the centre line at C,and from C draw tangents to one of the circles by Prob. XIX. Those tan-gents will tonch hoth circles, as required. ^Id 2fethod (fig.… … Fig. 111. on A describe a circle with the radius A G, and cb*aw tangents B I, B K, tothis circle from the other centre B ; from A and B draw perpendiculars tothese tangents, and join C, D, and E, F, for the required tangents. JS^ote.—^The second method is useful when the diameters of the circlesare…
