CONTENTS 



CHAPTER I. Pure and Reflected Light. Our knowledg^ 

 of light How light is obstructed by atmosphere Dust 

 and vapor particles in the air Pure sunlight violet- 

 blue White light the residue after filtering through the 

 air Differences in light Shown in cleared air And 

 from mountain-tops Earth coloring regulated by density 

 of the air Warm and cold colorings The dust veil 

 Krakatoa and the red skies Color in the tropics And at 

 the poles Sunlight in summer The dawn In Egypt 

 with its wings of light In temperate climes Flooding 

 of the dawn-light The sunrise Sunrise colors Noon- 

 light Its great beauty in the fields The fall of light- 

 Sunset Bed sun disks Sunset colors Spectrum colors 

 on the sky Sky effects Twilight Zodiacal light The 

 moon and its rise The misshapen moon Twilight and 

 moonlight blended Horizon hues at twilight Star-light 

 Star-colors Darkness of the upper space Lights of 

 the night The great variety Countless changes Beauty 

 of the world 1 



CHAPTBB II. Broken and Shaded Light. Cloud light 

 and the cloud veil The lowery day Rain clouds Storm 

 light Night and storm clouds Mists and fogs Vapor 

 lights White horizons Fog lights Fog and smoke 

 Fog effects Color in fog banks Nature's delicate hues 

 Alternate sunlight and cloud light Sun-bursts The 

 fall of sunbeams Sun-shafts with rain The sun " draw- 

 Xiii 



