INDEX 



25 



Mesophyll of leaf 273 



Mesophytes. ilfiiniiiuii .,1' . . 397 



Mesothorax of grasshopper 16 

 Metal container dangerous 



for milk 300 



Metamorphosis 16 



complete 17 



incomplete 16 



Metathorax of grasshopper 16 



Metazoa, defined 66 



Method of pollination, basis 



of classification •"-<>•"> 



Meyer. Hans, discovery of . . 223 

 Mice, destroyed by hawks 145, 14<» 



harmful mammals 166 



Microbes, a name for bacteria . 343 

 Microphotograph. of bone 



(fig.) L86 



of brain (fig.) 212 



of conjugating spirogyra (fig.) 341 



of corn stem (fig.) 279 



of hydra (fig.) o"'> 



of stomach (fig.) 170 



of sun flower stem (fig.) . . . 286 



Micropyle, of bean 261 



use of 300 



Microscope, inventor of . . . 350 

 Microscopic animals and 



plants 233 



Middle ear (tig.) . . . . 217,218 

 Middle West, production of 



corn by 318 



Midrib of marchantia . . . 367 



Migration of birds .... 143 



Milk, care of 350 



card of , example of protein . 266 

 from healthy cow . Dumber of 



bacteria in 347, 348 



good and bad hottlinu i t'iL, r .) . 362 



indirect product of plants . . 101 



value of, as food 178 



Milk glands, characteristic of 



vertebrates 150 



Milk teeth (fig.) 166 



Milkweed, fruit (fig.) .... 312 



plant distributing seeds (fig i 313 

 Milkweed butterfly .... 



Milt of fish Ill 



Mineral matter in food ... 1 



Mineral substances .... 179 



on to j"i'/' § 



Mink, harmful mammal . . . 



Mint, flower ol .... 



Mint family, charactei 

 Mints used for medic ;d 



in food 



Mistletoe, absorbing orgaus ol 



a Bemi-parasite I 



branch infected \\ ith (rig.) . 

 Mites, arachnids 91 



parasitic 



Mixed diet of man .... 170 

 Model, dairj cow i fig, i . . . 



dairy stable (fig . , . 248 



resen oir (fig.) . . . . . 'Jin 

 Modified cotyledon (scutel- 



liu f corn 



Modified leaves, of club m.>-> 



of husks of corn 



of |><-;i plant (fig.) 



Moisture, a condition for 

 growth of bacteria .... 34 \ 



a Bl imulus 



a vital condition 315 



for lichen gathered by fungus , 



Molars of man 167 



Mold, grown from water (fig I 



Molds, classified 7 



Moles destroyed by hawkfl . \\'< 

 Mollusca. classified 



number of 



MoUusks, characteristics of . . M 



life history of 



Bhells of, home of hermit crab 91 



summary of 1"'-' 



Molt, defined 16 



Molting, discussed 



Monarch butterfly (fig | 20 



laboratory b( udy of .... 

 Monkey, example of mammal . 7 

 Monocotyledons, group of 

 flowering plants 7 



represented bj com 



Beeds of . 

 Monoecious flower, defined 



Of beech family .... 



of w alnnt famih 

 Morning glory, a climbli 

 plan! 



a dicotj ledon 



sc. (iiin--, of US 



