| District. | A | B | C | D | E |
|---|---|---|---|---|---|
| Miami valley, Ohio | 2 | 3 | 5 | ||
| Brown county, Ohio | 1 | ||||
| Keokuk district, Ohio | 1 | 1 | |||
| Brown county, Illinois | 1 | 2 | |||
| Eastern Tennessee | 2 | 2 | |||
| Kanawha valley, West Virginia | 4 | 1 | 2 | ||
| Savannah, Georgia | 1 | 1 | |||
| Northeastern Kentucky | 1 | ||||
| Licking county, Ohio | 1 | ||||
| KEY: A = Sandstone. B = Argillite. C = Granite. D = Sienite. E = Greenstone. | |||||
F. Grooved on both faces and one side, with both sides flat. There is only one of this form in the collection; it is of argillite, from Keokuk, Iowa.
G. Grooved on faces only, with both sides flat ([figure 38], of granite, from Keokuk, Iowa). There are from the same place one of porphyry, one of argillite, and three of sienite. This and the preceding form seem peculiar to that locality.
Fig. 36.—Grooved ax, showing flattened curved back.
Fig. 37.—Grooved ax, showing flattened straight back.
There are a few exceptional forms which are not placed with those just given, since they may have some features common to all except the Keokuk type, while in other respects they differ from all. Among them are some entire-grooved or grooved only on the two sides and one face; the general outline may correspond with some of the regular forms, but one face is curved from poll to edge, while the other is straight or nearly so ([figure 39], of granite, from Wilkes county, North Carolina). This specimen has a depression, as if worn by the end of a handle, on the straight face at the lower edge of the groove.
None of this form are long enough for hoes, and although they may have been used for axes and hatchets, their shape seems to indicate use as adzes. Besides the one figured there are two from Savannah, Georgia; three from eastern Tennessee, one with a slight groove and very deep side notches; and three from western North Carolina, two of them entire-grooved with groove projections.
