INDEX TO ILLUSTRATIONS 



XV 



United States (continued) : Page 



Clumps of desert vegetation near L,as Vegas, 



1\ evada 706 



Column in the white sands of New Mexico. . 692 



Communal life on Umatilla Project, Oregon. 349 



Crooked Creek, Long N'alley, California.... 654 



Crushing the pulp of a decapitated bisnaga 



to obtain a drink in central Arizona. . . . 712 



Deformed branch of a hackberry tree which 

 has been infected by mistletoe for ten to 

 twelve years: Near Belton, Texas 962 



Desert plain of Las Vegas, Nevada, showing 



expanses of loose alkaline soil 707 



Dona Ana Mountains, central New Mexico, 



from town of Dona Ana 649 



Edwin Natural Bridge: San Juan County, 



Utah 166 



Edwin or Little Bridge: Height, 108 feet; 



span, 1 94 feet : Utah 15O 



Egg of house-fly greatly enlarged 452 



English sparrows, male and female, showing 

 the manner in which they take posses- 

 sion of nesting boxes provided for native 

 birds 949 



Erratic in Bronx Park, New York City.... 529 



Female house-fly resting on glass and seen 



from above 374 



Fifty-five-inch wood stave pipe for carrying 

 water across rough country: Sunnyside 

 Unit, Yakima, Washington 35S 



■"Flatiron Building" compared with the Sho- 

 shone Dam, Wyoming 357 



Fly larvae and pupae in waste paper (ash pit 



refuse), natural size 452 



Fossil shell of a small cretaceous conch, 



Pyrgulifera humerosa 447 



Front view of the head of a house-fly 376 



Giant cactus (Saguaro): On desert southwest 



of Phcenix, Arizona 651 



■Giant 30-foot Claosaurus 448 



Glistening, barren peaks, almost as white as 

 the snow banks which cover them in 

 places rise from a plateau almost as bare 220 



Goathaunt Peak: A spur of Jilount Cleveland, 



Lewis Range 218 



Grand Canyon of the Colorado at the junc- 

 tion of the Little Colorado: Arizona.... 634 



Grand Canyon of the Colorado near the 



Hance Trail : Arizona 635 



Greatest natural stone arch known — the 

 Nonnezoshi Arch: Height, 308 feet; 

 span, 27s feet : Utah 162 



Haying scene in the Strawberry Valley, LUah 338 



"Heaven's Fold," as seen from Mount 



Heavens, Livingston Range 222 



Herd of domesticated \'irginia deer belong- 

 ing to R. H. Harris, Clarkesville, Texas. 274 



Highest dam in the world, the Shoshone 



Dam, Wyoming 354 



Hill containing thousands of tons of anthra- 

 cite coal waste, or rejected culm: Scran- 

 ton, Pennsylvania 1 067 



Inexpensive nest box for English sparrows.. 150 



Interior of orange packing plant at Redlands, 



California 660 



In the south portal of the Elizabeth Tunnel, 



Los Angeles aqueduct, California 577 



United States (continued) : Page 



Isolated hackberry tree near Belton, Texas, 



with innumerable bunches of mistletoe.. 963 



Landslide surface of one of the summits of 



Red Mountain 278 



Log railway and aerial tram to carry men 

 and materials for Los Angeles aqueduct: 

 California 572 



Looking down into Tieton Canyon : Yakima 



Project, Washington 353 



Los Angeles Aqueduct: J. B. Lippincott, 

 Assistant Chief Fngineer; Hon. Fred 

 Eaton, father of the Owens River Proj- 

 ect; William Mulholland, Chief Engineer 574 



Male house-fly resting on glass and seen 



from below 375 



Marengo Avenue, Pasadena, one of the finest 

 residence streets, shaded by giant pepper 

 trees 661 



Medals presented to Commander Robert E- 



Peary 538-539 



Mission Ridge, Montana: Geological Survey 



triangulation party 221 



Mud cracks in the valley of the Lower Colo- 

 rado 964 



Mud cracks utilized: Beets in the foreground, 

 peas at left, wheat at right, the latter 

 being the corner of a lo-acre tract 965 



Municipal cement mill, with clay beds and 

 limestone quarries, Los Angeles aque- 

 duct: California 578 



Navajo Church, a product of erosion: West- 

 ern New Mexico 637 



Navajo Falls, on Cataract Creek: Arizona... 638 



Oasis of palms in the mouth of a canyon 



near Indio, Colorado Desert 708 



One of the aqueduct tunnels, Los Angeles 



Aqueduct: California 586 



One of the many small aqueduct supply sta- 

 tions in the heart of the Mojave Desert: 

 California 573 



Ostrich Rock: An erosive feature in the 



Petrified Forest of Arizona 645 



Orange groves of Redlands, California, with 



San Bernardino Mountains in background 663 



Perspective and sectional drawings of an im- 

 provised nesting box for the interior of 

 buildings 95 ' 



Placing the forms to be followed by the 

 pouring of concrete, Los .Xngeles Aque- 

 duct : California 580 



Pritchett Valley Bridge near Moab: Height. 



49 feet ; span, 1 22 feet 1 64 



Privy vaults, swarming with flies, adjoining 



kitchen door 45- 



Potatoes grown on the A. J. Smith ranch of 



the Minidoka Project near Rupert, Idaho 341 



Pueblo of Zuni, in western New Mexico 652 



Pure "phosphate rock" : Florida 789 



Putting on the cover of the aqueduct in the 



Mojave Desert: California 583 



Remarkable rock stream: San Cristobal quad- 

 rangle. Colorado 280 



Remarkable vine, the guarequi. whose base 



serves as a storage organ 696 



Rock stream at head of Silver Basin. Silver- 

 ton landslide area 284 



