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The Cave Man and the Moving Shadow 16 Time Telling in the "Land Between the Rivers" 32 The First Recorded Sun Dial 40 The Clepsydra, or Water Clock 56 Types of the Earliest Time Tellers 64 Galileo Discovering the Principle of the Pendulum 72 A Time Piece of the Middle Ages 80 Ancestors of the Watch 88 The First Pocket Time Piece 96 The "Nuremburg Egg," the First Real Watch 104 First Forms of the Watch 112 Sixteenth Century Watches 120 Late—In Spite of His Two Watches 128 Seventeenth Century Watches 136 The Swiss "Manufacturer" and a Craftsman 144 The First Yankee Clock Maker 152 "Grandfather's Clocks" 160