TABLE OF CONTENTS xi 
EXERCISE page 
77. The Sunfish.77 
78. The Frog.78 
79. The Metamorphosis op a Frog.81 
80. Reptiles .82 
81. A Bird.83 
82. A Mammal .83 
83. Interrelations of the Life about a Pond.84 
84. Interrelations of the Life in and about a Decaying 
Stump . 85 
85. Supplementary Problems .86 
I. The Development of the Lilac Bud.86 
II. The Development of the Flowers and Fruits of the 
Dandelion.87 
III. The Development of the Flower and Fruit of the 
Maple or Elm .88 
IV. The Behavior of the Robin and the Red-winged 
Blackbird.89 
V. Common Trees of the Vicinity.90 
VI. Common Shrubs of the Vicinity.91 
VII. Wild Flowers of the Vicinity.92 
VIII. Weeds of Lawns and Gardens of the Vicinity .... 92 
IX. Reptiles of the Vicinity.93 
X. Common Birds of the Vicinity.93 
XI. Smaller Wild Mammals of the Vicinity.93 
Appendix. . ..94 
I. A Test for Carbon Dioxide.94 
II. A Test for Oxygen .94 
III. Fehling’s Solution.• • • 94 
IV. Starch Paste.95 
V. Formalin as a Preservative.95 
Bibliography.97 
Index.99 
