_Beaver World_ _Frontispiece_
_A Young Beaver on the side of a Beaver House_ 6
_A Young Beaver Sunning Himself_ 22
_In the Harvest-Field_ 32
_Aspens cut by Beaver._
_Beaver Ponds_ 42
_A New Dam_ 66
_Part of an Old Dam 1040 Feet Long_ 78
_The Spruce Tree House and Food-Pile, October 12_ 92
_Lake-Bed Canals at Lily Lake, October, 1911_ 102
_Section of a 750-foot Canal at Lily Lake_ 102
_Plan of Beaver Colony on Jefferson River, near
Three Forks, Montana_ 108
_An Unplastered and a Plastered House_ 124
_The 334-foot Canal_ 140
_Plan of Moraine Colony, with Dead-Wood Dam_ 144
_The Dead-Wood Dam_ 148
_The Moraine House before and after Enlargement_ 168
_House in Lily Lake_ 180
_House, Food-Pile, Pond, and Dam in Winter_ 198
_Where Beaver formerly lived and spread Soil_ 218