226 



INDEX 



Shaft of feather, A. B., 67, Fig. 50. 



Sheath leaf, P. B., 100. 



Shoulder blades, H. B., 146, Fig. 44. 



Shower baths, H. B., 141. 



Shrimp, A. B., Fig. 116. 



Shrub, P. B., 156, Fig. 79. 



Sieve tubes, P. B., 50, 62, Fig. 16. 



Silkworms, A. B., 20, Fig. 16. 



Siphons of mollusk, A. B., 184. 



Skeleton, H. B., 144-150, Fig. 44. 



Skeleton of arm of man and wing of 



ostrich, A. B., Fig. 48. 

 Skeleton of leg of man and of os- 

 trich, A. B., 68, Fig. 51. 

 Skin, H. B., 139-143, 

 Skull, H. B., 146, Fig. 44. 

 Sleep, importance of, H. B., 129, 151, 



160. 



Sleeping sickness, A. B., 174. 

 Slip, P. B., 106. 

 Small intestine, H. B., 97. 



absorption, in, H. B., 100. 

 Smallpox, H. B., 40. 

 Smuts, P. B., 152-153, Fig. 77. 

 Snail, A. B., Fig. 133. 

 Snake, A. B., Fig. 135. 

 Soda water, H. B., 66. 

 Soil, P. B., 110-114. 



air in, P. B., 111. 



cultivation of, P. B., 113. 



heat, relation .of soil to, P. B., 112. 



moisture of, P. B., 111. 

 Soil fertility, relation of bacteria to, 



H. B., 20. 

 Soil water, 



absorption of, .P. B., 41. 



transmission of, P. B., 42, 48, 58. 

 Soluble mineral matters, H. B., 95. 

 Soothing sirups, H. B., 78. 

 Sorus of fern, P. B., 162, Fig. 82. 

 Soups, prepartaion of, H. B., 53. 

 Source of energy, P. B., 66. 

 Sow bug, A. B., Fig. 115. 

 Sparrow, A. B., 80, 90, Fig. 70. 

 Species, plant, P. B., 161, 170. 

 Spermary, A. B., 70. 



of crayfish, A. B., 159. 



of fern, P. B., 163. 



of fish, A. B., 137. 



of frog, A. B. v 114. 

 Sperm cell, 



of bee, A. B., 36. 

 of bird, A. B., 70, Fig. 53. 

 of butterfly, A. B., 11. 

 of crayfish, A. B., 159. 

 of fern, P. B., 163. 

 of fish, A. B., 137. 

 of frog, A. B., 114. 

 of grasshopper, A. B., 28. 

 Sperm nucleus, P. B., 77, Figs. 27, 28, 



29. 



Spinal cord, H. B., 155. 

 Spiracles, A. B., 26. 

 Spirilla, H. B., Fig. 7. 

 Spirillum form of bacteria, P. B., Fig. 



71, D. 



Spirogyra, P. B., 167, Fig. 85. 

 Sponges, A. B., 175, Fig. 123. 

 Spore formation of bacteria, H. B., 



13, Fig. 7. 

 Spore formation in bacteria, P. B., 



143, Fig. 71, D. 

 Spore cases, of mold, P. B., 150. 



of ferns, P. B., 162, Figs. 82, 83. 

 Sprains, H. B., 149. 

 Spreading board, A. B., 2, Fig. 3. 

 Spore-producing plants, P. B., 161- 



170. 

 Spores, 



of mold, P. B., 150. 

 of ferns, P. B., 162, Figs. 82, 83. 

 Spur, P. B., 80. 

 Squash, cross-pollination, P. B., 86, 



Fig. 32. 



Squash seedling, P. B., Fig. 45. 

 Stamens, P. B., 71, 72, 80, 88, Fig. 24. 

 Staminate flowers, P. B., 87, Figs. 32, 



A, 33. 

 Starch, 



composition of, P. B., 13, 15. 

 digestion of, P. B., 36, 37 ; H. B., 



90, 98. 

 manufacture by chlorophyll, P. B., 



23, 90, 98. 

 manufacture by different kinds of 



leaves, P. B., 22, footnote, 

 manufacture in sunlight, P. B., 22. 

 test for, P. B., 15. 



