American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 50
make the arcs, gent to both, and you have the line C D,parallel to A B. To find a lost centre, or to find a circle whichshall touch three given points, not in thesame straight line : Let A, B, C (~F\<y 5), be … the points ; set the compass in A, with anopening greater than half the distance fromA to B, and describe the arc E G; then fromB, as a centre, construct the semicircle EF H ; then, from C produce the arc F H.A straight line through the intersections ofF H, and E G, will meet at T>, which is…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
