align="left">  The Wood-chuck

116   The Chipmunk—field exercises 117   The Eastern Swallow-tail Butterfly 118 Chapter VII. Form II: Winter Care of Plants in the Home 120 Trees 121   Collection of Wood Specimens 122 Related Reading 122 The Dog 123   Class-room lesson; observation exercises; correlations 123 Lessons Involving Comparison 125   Cat and dog; experiments for assisting in the study of the cat; comparison of the horse and cow 126 The Squirrel 129   Field exercises; class-room lesson 129 Winter Birds 130   Field exercises; class-room lesson; correlations 130 Animals of the Zoological Gardens 132 Chapter VIII. Form II: Spring Garden Work 133   Combating Garden Pests 134     Cutworms; root-maggots; flea-beetles 134   Seed Germination 135 Plants for Individual Plots 137   Studies Based on Observations of Growing Plants 137     Planting and care of sweet-peas 138 Wild Flowers 139 Weeds 140 The Apple Tree 141   Field exercise; class-room lesson; field exercise following class-room lesson 141 Bird Study 143 The Toad 143   Field exercises; class-room lesson; detailed study; life history of the toad 143 The Earthworm 147   Class-room lesson; references 148 The Aquarium 149   Aquarium Specimens