Crevasse, origin of the word, [51];
what a crevasse looks like, [51], [53];
Agassiz' adventure in, [51];
voices of, [54];
their water-mills, [55];
picture of a crevasse swallowing an avalanche, [63]
Crystallization and the fairy land of change, [93];
how the pebble caught cold and what came of it, [94];
crystals in sugar and granite, [94];
the great melting pot and the remaking of the rocks, [96];
how old rocks hatch new ones by sitting on one another, [96];
how mountain making helps, [97];
how Mother Nature uses salt and soda in cooking rocks over and how she keeps these materials handy, [99];
an illustration of how men of science study things out for the fun of it, [104];
the crystal fairies and their curious ways, [106];
how crystals help tell about dikes, [243]
Dead Sea, its deadness and how it died, [207];
and the story of Sodom and Gomorrah, [209];
what "Lot's Wife" looks like to-day, [210];
ancient history on the Dead Sea's walls, [249]
Deltas, why delta river mouths always multiply by two, [167]
Descent of Man, how man has risen as he descended, [269]
Desert, origin of Lybian (myth), [2];
enigmas of, [161];
the desert and the Sphinx, [162];
physiography and coloring, [163];
"Baths of the Damned," [165];
river "skeletons," [166];
indications of former heavier rainfall, [166];
Roman aqueducts, [166];
"sand roses," [168];
how the desert makes its sands, [168];
its trade-mark on its sand grains, [172];
why deserts are so cold at night, [170];
how a simoom looks from the outside, [173];
how it begins business, [184];
the plant people of the desert, [174-175];
how the Rose of Jericho goes to sea, [176];
the cactus wren and how she bars her front door against her bad neighbors, [177];
the "wind witches" of the steppes, [178];
animal life in the desert, [178];
the coyote as a ventriloquist, his night song, [179];
bird life, [180];
why the desert humming-birds have rusty coats, [180];
how the trap-door spider slams the door in the centipede's face, [182];
a beetle that uses poison gas, [182];
wonderful flight of the vulture, [183];
a day with the Arabs in the Sahara desert, [183];
the cat, the dog, the Arab, and the struggle for life, [187], [188]
Diamonds, form of their crystals, [107]
Dikes, what one in New York City tells about marble making, [97];
the iron walls near Spanish Peak, [235], [241];
dikes in the rocks at Marblehead, [242];
how dikes get their driving power, [244]
Dinosaurs, their dreadfulness, their habits and their family name, [23]
Diplodocus, his name, his gentle nature, his defensive tail and how it helped him at his meals, [24]