INDEX 



229 



Weed seeds destroyed by birds, A. B M 



85. 



Whale, A. B., Fig. 136. 

 Whale oil soap, A. B., 61. 

 Wheat, P. B., 128. 



seedling, P. B., Fig. 46. 

 White corpuscles, H. B., 7, Fig. 5; 



devouring bacteria, H. B., 29, 43, 



Fig. 12. 

 White matter of nervous system, H. 



B., 157. 



Window box, P. B., 102. 

 Windpipe, 



of frog, A. B., 101. 



of man, H. B., 126, Fig. 40. 

 Wine, P. B., 129, 148. 

 Winged fruits, P. B., 91. 

 Wings, 



of bee, A. B., 32. 



of bird, A. B., 65. 



of butterfly, A. B., 7. 



of grasshopper, A. B., 25. 



Winter visitants, A. B., 81. 

 Wood, P. B., 46. 

 Wood-cells, P. B., 43, 49, 63. 

 Woodpecker, A. B., 79, 90, Fig. 66. 

 Woody bundles, P. B., 47, 50, Fig. 



15. 

 Worker bees, A. B., 37, Figs. 24-28. 



Yeast, P. B., 146-149, Fig. 74. 



buds, P. B., 146. 



changes caused by, P. B., 147. 



reproduction of, P. B., 146. 



uses of, P. B., 148. 

 Yellow fever, A. B., 50, 174; H. B., 



42. 

 Yolk, 



of fish, A. B., 140, Fig. 103. 



of hen's egg, A. B., 71, Figs. 52, 

 55. 



Zoology, definition, P. B., 4. 

 Zygospores of spirogyra, P. B., 168. 



Printed in the United States of America. 



