438 



Index 



PAGE 



water-tiger 280 



water-vole 273 



water walking-stick 276 



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



water, buoyancy of 3° 



densitv of .30, 31, 36, 54. 3 14 



depth of 29,307,321 



for drinking 21 



fertility of 56 



force of 135 



freezing of 31, 80 



ground 30, 56 



hardness of 5 1 



high and low 74. 9° 



mineral content of 52, 53 



mobility of 3° 



population of 100 



run-off 56, 57, 85, 117 



running 39 



as a solvent 25, 40 



stagnant 13° 



standing 44 



storage of 4°3 



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, 400 



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 158 



Wilson, W. M 79 



winds 27, 33, 35, 85 



Wolffia 15° 



Wolle in 



worms 254, 257, 285, 367, 390 



worms, cylindric 172 



hair 174 



Nematode 172 



Nemertine 174 



oligochete 325 



parasitic 174 



thread 172 



true 34° 



wrigglers 227, 250, 339 



Wright, A. H 236, 237 



Zaitha 211 



Zannichcllia. 153 



zooids 166, 169 



Zostera 334 



Zygnema 119 



zygospores 120, 263 



