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, 314 



depth of 29, 307, 321 



for drinking 21 



fertility of 56 



force of 135 



' ' freezing of 31,80 



ground 30, 56 



hardness of 51 



high and low 74, 96 



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 



waters, 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'-the wisp 96 



willows I s8 



Wilson, W. M 79 



winds 27, 33, 35, 85 



Wolffia 150 



Wolle in 



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 



