Illustrations 17 



rAOF 



174 Salmon at hn^c of falls 362 



175 Leaping salmon 362 



176 Sigsbee sounding machine in use on the "Albatro.--.s" . . 364 



177 Bigelow water bottle 368 



178 Blake deep sea trawl 369 



179 Tow-nets in use on the "Albatross" . . 371 



ISO Jaws of whalebone whale 373 



181 Hensen's net 374 



182 Synura 378 



183 Gypsy moths and caterpillars on trees 386 



184 Trees stripped by gypsy moth caterpillars 386 



185 Alfalfa field ruined by mice 387 



186 Red-tailed hawks 388 



187 Barn owl . 389 



188 Skulls disgorged by barn owls 389 



189 Meadow mice 394 



190 Apple tree girdled by mice 395 



191 Cottontail rabbit 397 



192 Brown rat 399 



193 Gray wolf and pups 401 



194 Ground squirrel 401 



195 Pocket gopher 402 



196 San Jose scale 403 



197 Mass of San Jose scales on tree tnmk 404 



198 Apples infested with San Jose scale 405 



199 Pitiful ladybird beetle 406 



200 Screw worm and cattle ticks 408 



201 Bamboo grove 410 



202 Udo 411 



203 Udo stem, blanched 412 



204 Tung oil tree . , 413 



205 Fruit of tung oil tree 414 



206 Pistache trees 415 



207 Indian mango 416 



208 Date plantation 417 



209 Bunch of dates 418 



210 Herd of buffalo 419 



211 Elk in Yellowstone Park 420 



212 Egret colony 421 



213 Group of fur bearing animals 423 



214 Otter 424 



215 Mink 424 



216 Seining salmon 428 



217 Salmon eggs 429 



218 Interior of salmon hatchery 430 



219 Developing fish . . . ' 431 



220 Seals on Pribilof Islands 433 



