CONTENTS 
Cuarterl. Pure and Reflected Light.—Our knowledge 
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—Red 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 ......cccecceseereree Sahwia eave aangiedl es 1 
Cuarter 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- 
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