INDEX 
9 
References are to pages 
Corn, distribution of ... 
296 
Crayfish — Continued 
embryo leaves of .... 
225 
circulatory system of . 
64 
example of monocotyledon . 
226 
digestive system of . . 
63 
flower, described .... 
204 
example of Crustacea . 
60 
indehiscent fruits .... 
237 
food and food-getting . 
62 
kernels filled by corn smut . 
324 
green glands of . . . 
63 
laboratory study of. 
226 
laboratory study of . . 
61 
leaf, description of ... . 
288 
life history of . 
64 
member of grass family . . 
295 
nervous system of . . 
64 
one of first plants culti- 
respiration of . 
63 
vated. 
295 
typical crustacean . 
60 
plant, prop roots of . . . 
253 
Creeping disk of snails . 
190 
raising as an industry . 
296 
Creeping stem, of trailing 
ar- 
raising as an industry, impor- 
butus. 
395 
tance of. 
296 
Crenate margins of mint leaves 
300 
“ seed, ” comparison with 
Creosote, preservative of woods 
354 
bean. 
224 
Cricket, member of Orthoptera 
29 
seedling. 
225 
harmful insect . . . . 
29 
smut, a parasite on corn . 
324 
Crocodiles, distribution of 
104 
smut, a fungus. 
324 
example of reptiles . . 
99 
stem. 
267 
Crop of earthworm . . . 
181 
Cornea of eye. 
473 
Cross-fertilization, defined . 
210 
Corolla, described. 
198 
changes produced by . 
211 
Corpuscles, red and white . 
449 
Cross-pollination, advantage 
of 
210 
Cortex of root. 
247 
effect upon wild plants 
211 
Cortical layer of kidney . . . 
458 
in breeding oats . . . , 
390 
of root. 
247 
Crow, example of birds . . 
9 
Corymb. 
214 
Crown, part of flower . 
202 
Cosmetic preparations 
504 
Crows, as scavengers . 
116 
Cottage cheese. 
505 
food of. 
36 
Cotton, member of mallow 
Crowfoot family, biting juice of 
297 
family. 
299 
characteristics of 
297 
source of clothing . . . 299, 376 
members cultivated for orna- 
Cottony cushion scale 
34 
ment. 
297 
Cotyledon of corn. 
225 
products of. 
297 
of bean. 
219 
Crustacea, classified . 
9 
of bean, importance of as 
economic importance of . 
65 
food. 
222 
Crustacea and related forms 
60 
of bean, storage of food in . 
220 
Cryptogams, classified . . 
9 
parts of seed. 
219 
defined. 
9 
Coughs . 
492 
Cuckoos, food of ... . 
42 
Cow, example of mammal 
9 
Culex (mosquito) . . . . 
55 
Cowbirds, nesting habits of . 
112 
Culture, for protozoa . 
143 
Cowpox, Jenner and .... 
510 
of bacteria. 
501 
Crabs, classified. 
9 
Curd of milk. 
416, 505 
common name for crayfish . 
60 
Cure of plant disease 
387 
economic importance of . 65, 526 
Cures of deafness .... 
503 
example of Crustacea . . . 
9 
Cures of epilepsy .... 
503 
Cranium of frog. 
88 
Cures of quacks .... 
501 
Crayfish, discussed. 
60 
Curing of meat, purpose . . 
313 
appendages of. 
601 
Curlydock, viability of . . 
223 
