438 



Index 



PAGE 



water-tiger 280 



water-vole 273 



water walking-stick 276 



water weeds. . .156, 161, 190,232,392 



water, buoyancy of 30 



•* density of .30, 31, 36, 54, 3 H 



*• depth of 29,307,321 



" for drinking 21 



" fertility of 56 



" force of 135 



'* freezing of 31, 80 



** ground 30. 5^ 



" hardness of 51 



" high and low 74, 9^ 



** . mineral content of 52, 53 



" mobility of 30 



" population of 100 



" run-off 56, 57, 85, 117 



" running 39 



" as a solvent 25, 40 



" stagnant 130 



" standing 44 



" storage of 403 



" surface tension of 54 



" thermal conservation of 40, 79 

 " transparency of . . . 26, 308, 309 



" turbidity of 27 



" underground channels of . 70 

 " viscosity of 30, 54, 244, 248, 

 249 



" . wastage of 403, 404 



?vaters, alkaline 51 



" cave 191 



" drainage 48 



flood 42 



PAGE 



waters, mineralized 40 



" polluted 162 



" public 386, 406 



Weismann 301 



wells 191 



Wesenberg-Lund 248 



whales 19, 274, 275 



Whipple, G. C 27, 42, 401 



whitefish 231, 233, 313, 388, 393 



wiers 169 



Will-o'-thewisp 96 



willows 1 58 



Wilson, W. M 79 



winds 27, 33, 35, 85 



Wolffia 150 



Wolle Ill 



worms . . .254, 257, 285, 367, 390 



worms, cylindric 172 



" hair 174 



" Nematode 172 



" Nemertine 174 



" oligochete 325 



" parasitic 174 



" thread 172 



" true 340 



wrigglers 227, 250, 339 



Wright, A. H 236, 237 



Zaitha 211 



Zannichellia 153 



zooids 166, 169 



Zostera 334 



Zygnema 119 



zygospores 120, 263 



