Cyclopedia of mechanical engineering; a general reference work Editor-in-chief Howard Monroe Raymond Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing . t the cylinder is onthe center of the rectangular piece is shown by tlie lines E Fand G H being drawnthrough the center ofthe circle in the planview, these lines beingthe center lines both ofthe cylinder and of therectangular piece. Ifthe cylinder were noton the center, two othercenter lines would bedrawn thiough the circleand the dimensionsgiven from each ofthese lines to the ce
Cyclopedia of mechanical engineering; a general reference work Editor-in-chief Howard Monroe Raymond Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing . t the cylinder is onthe center of the rectangular piece is shown by tlie lines E Fand G H being drawnthrough the center ofthe circle in the planview, these lines beingthe center lines both ofthe cylinder and of therectangular piece. Ifthe cylinder were noton the center, two othercenter lines would bedrawn thiough the circleand the dimensionsgiven from each ofthese lines to the centerlines of the rectangularpiece, or to the edges ofthe piece. The factthat the holes are sym-metrically located isshown by the dimen-sions being given be-tween the center linesof the holes and nodimensions being given from these center lines to the center linesof the piece. Fig. 20 shows how the j^iece might be dimensioned if thecylinder were not on the center of tlie rectangular piece and tlieholes were not symmetrically located with respect to the center,of the rectangular piece. If the centers of a set of holes are so located that a circle canbe drawn through tliem, we always locate the holes by drawing a. 76 14 M KCII AN ICAL DllAVVIXO. 2 2 center Hue circle tliroufjli their centers and giving tiie diiiineterottliis circle, and if no other dimension than this is given for theh)cation of the holes, it is understood that they are equally spacedaround this circle. Fig. 2l illustrates tliis. If the holes are noteipially spaced around the circle, they niay he located as shown inFig. 22. ])iametei-s of circles, and of arcs of circles which are greaterthan semicircles, should be given rather than radii, hut if the arcof the circle is less than a semicircle, its radius shoidd he given. Fig. 23 sliows how this should be done when tlie radius is large enougli to permit; but if the radius is small, or the dimensions would interfere with other -M parts of the drawing, it I may be don
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