Fig. 1411.
Fig. 1412.
Fig. 1413.
[Fig. 1411] represents a pair of inside calipers for measuring the diameters of holes or bores. The points of these calipers should be at an angle as shown in the [Fig. 1412], which will enable the points to enter a long distance in a small hole, as is denoted by the dotted lines in the figure. This will also enable the extreme points to reach the end of a recess, as in [Fig. 1413], which the rounded end calipers, such as in this figure, will not do.
