human
College Physiography on page 239; Darwin's
gpt
Formation of Vegetable Mould
human
Introduction to Physical Geography on page 94;
gpt
Picturesque America
human
American Boy's Book of Bugs, Butterflies, and Beetles on page 229; McCook's
gpt
Natural History of the Agricultural Ant of Texas
human
Scientific American Boy at School
gpt
Nature's Craftsmen
human
Top of the Continent on page 5;
gpt
Country Life Reader on pages 9, 64, 85, 114, 186, and 241; Osborn's
human
Men of the Old Stone Age on page 33. Hornaday's
gpt
American Natural History on pages 116, 117, 119, 123, 130, 144, and 225; Seton's
human
Life Histories of Northern Animals
gpt
The Bird, Its Form and Function on page 167; Salisbury's
human
Physiography
gpt
Ants and Their Structure
human
Year Out of Doors on page 11;
gpt
Riverside Natural History on page 117; Mill's
human
In the Beaver World
gpt
Ancient Times on page 67;
human
Agriculture for Beginners on page 47; Bergen's
gpt
Foundation of Botany on pages 49, 190, and 197; Bergen's
human
Elements of Botany on pages 193 and 195; Beal's
gpt
Seed Dispersal