290 
BULLETIN OF THE NATURAL HISTORY SOCIETY. 
and H inches wide. It weighs 17 J ounces. The groove of the axe 
is smooth, except at the edges, and vertical to the shoulder, rectan- 
gular in shape and slightly rounded at the corners. 
The owner of this implement could use it either as an axe or a 
hammer. It was produced by natural wear from a fine grained 
Fig. 2, Grooved Stone Axe. (Natural size). 
argillaceous altered sandstone boulder, which had a band in the upper 
part more calcareous than the rest. 
When exposed to the weather the more calcareous material 
decomposed and was worn off, thus producing the groove, and in this 
condition it was found by a man of the stone age. His eye saw that 
with little labor it could be fashioned to suit his purposes, and when 
