314 



HORTICULTURE FOR SCHOOLS 



origin of, 215 

 Cone-bearing trees, dissemination 



of seeds of, 44 

 Consumer's dollar, 288 

 Control of codlin-moth, 229 



of insects by parasites, 238 



of plum curculio, 236 

 Cooperation, benefits of, 283 



examples of, 284 



in marketing, 281 

 Conn described and illustrated, 64 

 Corn, parts of seed, 43 

 Corolla, function of, 159 

 Cost of marketing oranges, 288-289 

 Cotton, injury by insects, 223 

 Cottonwood, dissemination of seed 



of, 44 



Cotyledons, 39 

 Cover-crops in orchards, 133 



in relation to fertilizers, 133 



prevent leachingj 130 

 Cowpea, 110 



Cresol, a by-product, 290 

 Cress, 107 

 Cross-fertile, defined, 162 



pollinated, 161 

 Crotons, propagation of, 56 

 Crown-gall, 252 



exercise, 259 



of almond, 192 

 Cucumber, squirting, 45 

 Cucumbers, 1KJ 

 Cucurbitoua crops, 113 

 Cultivating vegetables, 88 

 Cultivation of blackberry, 211 



of orchards, 127 



of strawberry, 208 

 Curculio on peaches, 186 



plum, 235 

 Curl-leaf, a disease of the peach, 



185 

 Currant, climatic requirements, 212 



propagation of, 56 



pruning and care of, 213 



Zante, 221 



Curves preferred to straight lines, 

 300 



Cuttings, apparatus for growing, 

 65-66 



different types of, 58-60 



hardwood, exercise, 67 



herbaceous, exercise, 67 



media for, 65 



of coniferous plants, 62 



of grape, 216 



progagation by, 57, 67 



semi-hardwood, 63, 67 



softwood, described and illustra- 

 ted, 62 



temperature, 65 



time to make, 60 

 Cutworms, control of, 89 

 Cydonia as stock for Pyrus, 70 

 Cypress, 306 

 Cytoplasm, description of, 19 



illustrated, 17, 19 



Damping-off , 257 



Dandelion, 106 



Darwin, brief summary of life, 7 



book, "Origin of Species, " 8 

 Decay in fruit, 262 



process of, 263 

 Deciduous fruits, 180 

 Depth of planting vegetables, 88 

 De Vries, Hugo, 10 

 Dibber, illustrated, 90 

 Dicotyledonous plants, 43 

 Diptera, 224 

 Diseases, control of, 258 



of currant and gooseberry, 214 



of vegetables, 89 



plant, illustrated by citrus canker, 



199 

 Disinfectants for pear-blight, 250- 



251 



Dissemination of seeds, 44, 52 

 Distillate as contact spray, 227 

 Division of foreign plant and seed 



introduction, 7 



Domestication, brief summary of 

 process, 6, 7 



laboratory exercises, 14 



