MAPS AND ILLUSTRATIONS xiii 



PAGE 



Intrenched Meanders, Map facing 188 



Lake Brienz from above Interlaken, Switzerland . . .. 189 



Old Fort Dearborn . . . . . . 191 



Singel Canal, Amsterdam 193 



Panama Canal . 194-195 



Hot Springs in the Yellowstone National Park, U. S. A. . . . 197 



Flowing Artesian Well . 198 



Stretch of a Roman Aqueduct near Nimes, France .... 199 

 A Primitive Water Carrier in Mexico / . 200 



A Standpipe ... 201 



Fire-tug in Action . . 202 



Wilson Avenue Water Tunnel, Chicago 203 



One of the Chicago Intake Cribs 204 



St. Louis Filter Plant . 205 



Picture Taken at Midnight on North Cape 211 



Winter Scene, in Venice . f* . 212 



Winter Scene in Montreal 212 



A Sailing Vessel ... 215 



Hot Water Tank . . . . . . . < ... .217 



Effect of Prevailing Wind on Growing Trees 218 



Wind Map for January and February 222 



Wind Map for July and August . 223 



Cyclones and Anti-cyclones 225 



Mean Storm Tracks and Average Daily Movements . . . 227 



A Tornado . . . . ...... , . . . . .231 



Effects of a Tornado . . . *.. : -.'. .,.; . . . .232 



Waterspout Seen off the Coast of New England . 233 



Magnified Snow Crystals .... . . . . . 234 



Average Rainfall of the United States ...... 235 



Salmon River Dam, Idaho . * . . ... . . . 236 



Top of Pike's Peak in Summer . . . ,< v . > . . . . 239 



Popocatepetl . . ... . - -., : T - 240 



Mid-ocean . ,= . . - -241 



Palm Trees on Tropical Island of Tahiti .... . .242 



Spiral Nebula ... --. -, . *. , . -\ . * - * . , . >- . . .247 

 Folded Strata . ...... .*,.:.. . . .249 



Temple of Jupiter near Naples ,-jV ,. . ,. * / .... 250 



Old Sea Beaches, San Pedro, California . , <; . . . .250 



Old Rock Beach, Imperial Valley, California . 



Granite . . . .' . . .'-;,. ' -. -:,} '. . . .253 



Fossil-bearing Limestone . . 253 



Conglomerate . . ...;.; 254 



Gneiss . . 255 



