C. Grooved near the middle. The class is represented by a beautiful specimen ([figure 114]) of hematite, with the groove much polished and irregular, and a deep notch cut in one end, from Ross county, Ohio. Another specimen, from Kanawha valley, West Virginia, is a double conical implement of hematite, elliptical in section with both ends ground off on flatter sides only.
Fig. 114.—Plummet, grooved near middle.
Fig. 115.—Plummet, grooved lengthwise.
D. Grooved lengthwise. This class includes a plummet of quartzite, from Yellowstone park ([figure 115]), and another of hematite, much shorter than the Yellowstone specimen and with blunt ends, from Kanawha valley, West Virginia.
Fig. 116.—Plummet, grooveless, perforated.
Fig. 117.—Plummet, double cone in shape.