Nature's Miracles, Volume 1
img img Nature's Miracles, Volume 1 img Chapter 21 WHAT IS A SPONGE
21
Chapter 1 WORLD-BUILDING AND LIFE.
Chapter 2 LIMESTONE.
Chapter 3 COAL.
Chapter 4 SLATE AND SHALE.
Chapter 5 SALT.
Chapter 6 THE ATMOSPHERE.
Chapter 7 AIR TEMPERATURE.
Chapter 8 CLOUD-FORMATION-EVAPORATION.
Chapter 9 CLOUD FORMATION-CONTINUED.
Chapter 10 WIND-WHY IT BLOWS.
Chapter 11 WIND-CONTINUED.
Chapter 12 LOCAL WINDS.
Chapter 13 WEATHER PREDICTIONS.
Chapter 14 HOW DEW IS FORMED.
Chapter 15 HAILSTONES AND SNOW.
Chapter 16 METEORS.
Chapter 17 THE SKY AND ITS COLOR.
Chapter 18 LIQUID AIR.
Chapter 19 RIVERS AND FLOODS.
Chapter 20 TIDES.
Chapter 21 WHAT IS A SPONGE
Chapter 22 WATER AND ICE.
Chapter 23 STORED ENERGY IN WATER.
Chapter 24 WHY DOES ICE FLOAT
Chapter 25 GLACIERS.
Chapter 26 EVIDENCES AND THEORIES OF AN ICE AGE.
Chapter 27 GLACIAL AND PREGLACIAL LAKES AND RIVERS.
Chapter 28 SOME EFFECTS OF THE GLACIAL PERIOD.
Chapter 29 DRAINAGE BEFORE THE ICE AGE.
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Chapter 21 WHAT IS A SPONGE

Before entering upon the great subject of water and ice-two of the most tremendous factors in world-building-let us consider a small matter, so far as its permanent effects are concerned, yet one which enters largely into the comfort and health of mankind, and which, though an animal, may be discussed where it belongs-under "Water."

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