LIST OF ILLUSTRATIONS 



Butterflies (Colored) Frontispiece 



PAGE 



Guinea Pigs 35 



School Specimen Cabinet ......... 44 



Nature-Study Class on a Field Lesson 50 



Brook at Work Removing a Landslide ...... 56 



Blue Jay (Pupil's Work) 58 



Pupils' Drawing. Tulips 63 



Good Comrades .......... 72 



Bat with Membranous Wings ........ 74 



A Female Rose-Breasted Grosbeak with Young 82 



Wing of Chicken with Quills and Coverts ..... 92 



Wing of Chicken Showing Attachment of Quills .... 93 



Barn Swallow's Nest .......... 94 



Nest of Chipping Sparrow ......... 95 



Nest of Wood Thrush 97 



Chimney Swift ........... 102 



Robin's Nest no 



Oriole's Nest . . . . . . . . . .111 



Humming-Bird's Nest .... . . . . ir3 



Wren Box, Showing Nest and Young . . . . . .114 



Young Grosbeaks, just Hatched . . . . . . .116 



A Weedy Corn-field, Feeding Ground of Birds . . . . .121 



Feeding the Chickens . . . . . . . -123 



Apple Tree Showing Woodpecker's Work . . . . . .125 



Red Owl 128 



Hunting Grouse .......... 134 



Young Grosbeaks .......... 141 



Bird's Drinking Trough ......... 144 



Bird Houses and Robin Tray 146 



Frog's Eggs 149 



Toad's Eggs 150 



Development of Frog 151 



The Toad 157 



Protective Coloration of the Toad . . . . . . -158 



Aquaria 166 



Aquarium with Sunfish 168 



The GiU of a Fish 171 



Pond for Collecting Aquatic Creatures 178 



Decaying Stump Harboring Insects 179 



Insect Net 180 



