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.

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.