CONTENTS XV 



ons and bitterns— Snipe — Sadness of bird-life — The for- 

 saken shores — Solitude — Beauty of the river — Its maj- 

 esty — The delta — Disintegration — The river in flood — 

 The " bore" — Meeting of river and sea — The blue tomb 

 —Shores of Gulf 63 



Chapter V. Lights Air, a/nd Color. — Popular ideas 

 — Sunlight on desert — Glare and heat — Pure sunlight — 

 Atmospheric envelope — Vapor particles in air — Clear air 

 — Dust particles — Hazes — Seeing the desert air — Sea- 

 breezes on desert — Colored air — Different hues — Pro- 

 ducing color — Refracted rays — Cold colors, how produced 

 • — Warm colors — Sky colors — Color produced by dust — 

 Effect of heat — Effect of winds — Sand-storms — Reflec- 

 tions upon sky — Blue, yellow, and pink hazes — The dust- 

 veil — Summer coloring — Local hues — Greens of desert 

 plants — Color of the sands — Sands in mirage — Color of 

 mountain walls — Weather staining — Influence of the air 

 — Peak of Baboquivari — Buttes and spires — Sun-shafts 

 through canyons — Complementary hues in shadow — Col- 

 ored shadows — Blue shadows upon salt-beds — How light 

 makes color — Desert sunsets 77 



Chaptek VI. Desert Sky and Clouds. — Common- 

 place things of Nature — The blue sky — Changes in the 

 blue — Dawns on the desert — Blue as a color — Sky from 

 mountain heights — Blackness of space — Bright sky-col- 

 ors Horizon skies — Spectrum colors — Bands of yellow 



The orange sky — Desert-clouds — Rainfall — Effect of 



the nimbus— Cumuli — Heap-clouda at sunset — Strati — 

 Cirri — Ice-clouds— Fire-clouds — The celestial tapestry — 

 The desert moon— Rings and rainbows— Moonlight — 

 Stars— The midnight sky— Alone in the desert— The mys- 

 teries-Space and immensity— The silences— The cry of 

 the human So 



