LIST OF ILLUSTRATIONS. 



PAGE 



Some of Nature's Scavengers ...... Frontispiece 



Cosmic Dust ........... 6 



Microscopic Section of Meteoric Stone 7 



Organic Matter found after the Evaporation of Snow .... 8 

 Vegetation in a Drop of Evaporated Snow ...... 9 



Diatoms .... 14 



Vegetable De"bris in Snow ......... 15 



Vegetable Debris found in Snow . . 16 



Bacteria ............ 18 



Rock Formation, Giant's Causeway, Ireland 31 



Section of Cornish Granite, showing Felspar, etc 34 



Sand Glacier overwhelming a Garden in Elbow Bay, Bermudas . . 38 

 Block of Plum-pudding Stone ........ 47 



The Cataract Cafion, Colorado ."....... 52 



Snow Crystals ........... 65 



The Mer de Glace, Switzerland 67 



Sheep Rocks 71 



Diagram of the "Inlands Ice," Greenland, extending into the Sea, 

 and ending in a Steep Fall from 100 to 200 feet high, from which 



Icebergs are Breaking off 73 



Broken-up Bergs 75 



Mammoth Hot Springs on Gardiner's River, Wyoming . . .90 

 Young Turnip Plant Nine Days from date of Sowing, showing how 

 the Root-hairs are closely covered with firmly-adhering Particles 



of Earth 95 



Pholas in a Shelter hollowed by it in a Block of Gneiss . . . 104 



Slice of Shale, seen under the Microscope .115 



Slice of Slate, seen under the Microscope 116 



Bad Lands, near Fort Bridger, in the United States . . . .119 



The Giant Oyster from Singapore . . . . . . .128 



One of the Astrasa Corals (Faria pallida] . . . . . 131 



Ground Plan of Keeling Atoll . . . ... . . . 135 



