INDEX 





Reft r> run i 



Arctic regions, continued 



plants of , modifications of . . 397 



use of lichens in 361 



Arm, superficial lymphatics <>f 



(fig.) 304 



Arms, example of organ ... B 



of starfish "_' 



Army worm, harmful insect 28 



Arsenic, a poison 232 



Arteries, function of . . . L97, 201 



in circulation of clam .... ( .»7 



of crayfish 90 



of fishes 109 



<ff man 201 



Arthropoda, classified ... <» 



example of 6 



number of <> 



word explained 86 



Arthropods. Bummary of . . 93 



Artificial respiration . . . . VX> 



Aseptic, defined 347 



Asexual reproduction, of 



amoeba 3 



of coelenterates <><> 



Ash, result of chemical change . 9 



Ash twig (fig.) 289 



Asparagus beetles .... 26 



Assaults and drink (fig.) . . 222 



Assimilation, defined .... 2 



in plants 279 



Aster, a common weed .... 3.'i4 

 Atmosphere, composition of , '- 1 

 Auditory organ of grasshop- 

 per 16 



Auricles of heart 201 



B 



Bacillus, a form of bacteria . . 343 

 Bacillus tuberculosis, cause 



of consumption 235 



Bacteria, action on lava . . . 4<x> 



and mold from bouse tly (fig.) ■ 251 



carried by insects 315 



cause of sour bread . . . • 179 



classified 1 



conditions necessary forgrowth 344 



decomposition of materials by ■ '>}! 



discussed 



distributed by (lies ;; *7 



art to /""/■ 



Bacteria, continut <t 

 etTect ni on medium on which 



they gro* 



fonns ol (fig.) 



harm to teeth from p. 7 



harmful 



helpful 



important plants .... 



in formation of Soil . J" 1 



injury caused to bean plant bj 



in relation to milk 



in runts of beans .... 270, 



in warm milk 



laboratory b1 ody of .... 



life processes of 



multiplication of 



proper conditions for growth of 

 shape and size 



corkscrew (spirilla) .... 



rod-shaped (bacilli) .... 



round (cocci) 



Soil (fig.) 



Bource of disease 4"1 



summary of . . .... 



unfavorable conditions with- 

 stood by 346 



where found 341 



Bacterial growths on agar 



plates (fig.) 



Bacterial poison, toxin , . . 

 Bailer in gill chambers of 



crayfish 



Balanced ration 177 



Balancing, use of tins for . . P>7 

 Balancing organ. .;ir a ■ . 218 



Balaam, adventitious roots on i"i 



Balsams, conifers 



Bananas, value of M fond 17s 



Barberry leaves i tiir i ... 



Bark, function of 



Barley, n cereal (figO ■ • • • 



;t monocotj ledon .... 



member of the grass family 



0D6 Of the tirst plants culti- 

 vated 



source of liquors .... 

 Barnacles, economic Impor- 

 tance of (fig.) "i. i" 1 



Baseball, advantage of M i nt- 



eise 



