ILLUSTRATIONS 



?as-e. 

 Plate I. Map showing the salient topographical and drainage features of 



eastern Wisconsin 8 



II. Map showing the headwaters of the Eock Eiver in southeastern 



Wisconsin 16 



III. Fig. 1. — Course of Catfish Creek, showing characteristic landscape 



of the Rock Eiver watershed in Wisconsin. Fig. 2. — Lower end 

 of Six Mile Creek, one of the numerous small tributaries which 

 form the upper sources of the Rock Eiver 20 



IV. Fig. 1. — Hardwood forest on a low, sandy ridge, consisting of oak, 



hickory, basswood, and elm. Fig. 2. — Tamarack swamp at left 20 



V. Fig. 1.— Pasture woods in which the trees are becoming stag-headed 

 on account of dry and improper conditions of the soil. Fig. 2. — 

 Hardwood forest from which cattle have been excluded, showing 



a protective undergrowth of shrubs and young trees 24 



VI. A grove of hardwoods on the top of a low hill, showing best position 



for forest growth in this region 24 



