A description of the Wisconsin districts from which the greatest number of such artifacts have been recovered up to the present time may be given as extending from about the middle of Milwaukee County, northward along the west shore of Lake Michigan to Door County, thence westward to the Wisconsin River or slightly beyond, thence southward along this stream to Dane County and eastward to Milwaukee County, the starting-point. Embraced within this territory are the extensive lake shore village-sites, from which thousands of articles have already been recovered, and certain well-known sites in Green Lake and adjoining counties, the Rush Lake, Lake Chetek, and similarly productive regions. The amount of copper implements obtained from the mounds and graves of Wisconsin is very small when compared with the quantity obtained from the village-sites and fields. _Classes and Functions_ The native copper artifacts of Wisconsin admit of separation into two principal classes, designated as implements and ornaments. Of these the former class is by far the more numerous. Mr. Henry P. Hamilton estimates that articles of utility constitute fully 95 per cent of the copper artifacts found in Wisconsin. It is but natural that on account of its proximity to the source of supply we should find in our own state not only a more bountiful supply of implements, but a greater range of classes, types, and varieties as well. The correctness of this conclusion is proven beyond doubt. In the matter of the number and artistic excellence of its copper ornaments and objects of a ceremonial nature, Wisconsin, while possessing some types apparently peculiar to itself, cannot properly be said to lead. The artistically cut or embossed sheet-copper discs, gorgets, and plates, the spool-shaped objects and copper-sheathed stone and wooden ornaments of Ohio, Illinois, and the South, are here conspicuous by their almost total absence. [Illustration: FIG. 585. (S. 1–1.) Copper spud with incised zigzag decoration. Fond du Lac, Wisconsin. Milwaukee Public Museum collection. ] No one Wisconsin collection contains all of the classes and types of the implements described in this bulletin. An examination of almost any local copper cabinet, however small, is almost certain to reveal the presence of some object that is original or peculiar; or some variation of a well-known type not elsewhere to be seen. The difficulties attending the making of a proper classification are therefore apparent. Especially among the objects classed as arrow- and spear-points the number of well-established types, of varieties and infrequent forms, is particularly numerous. In a somewhat lesser degree this is also true of other classes of implements.