These points vary in length from less than one inch up to six inches or more. The majority, however, are of small size and do not exceed two inches in length. The most prevalent form is fashioned in the shape of an attenuated hollow cone of small diameter. Other specimens have the point solid for an inch or more back from the tip. Less frequently they are furnished with an open angular socket and hip like that of the ordinary socketed copper spear. In a few examples the flanges of the socket are pierced with a square or round hole, as if for the reception of a rivet, or possibly for the attachment of a light line. A few have a rivet-hole also at the base of the socket. It has been stated that these points have occasionally been found with fragments of the wooden shaft filling or extending beyond the socket. Their presence in numbers upon the sandy lake shore sites where the aboriginal residents appear to have depended largely upon the fishing industry for subsistence, appears to indicate their employment in such a connection. Possibly in the shooting or spearing of fish. [Illustration: FIG. 608. The base of the Effigy Mound, Hopewell Group. Explored in 1891–92. Copper axes and plates in the foreground, lying as found. Teams, thirty to forty feet distant, and two feet higher than the deposit. ] 6. Ridged socketed points. If we except from consideration the very numerous small awls and fish-hooks, we may truthfully state that this is by far the most common type of copper implement occurring in Wisconsin. Thousands of these points have been collected in Wisconsin, and probably as many or an even greater number are yet to be recovered from the soil. They are represented in greater or less numbers in every Wisconsin and in many other collections.