The Earliest Hunters, 75. The Use of Slings, 77. A Fortunate Accident; 77. As to Arrows, 81. A Shooting Machine, 81. And Now for Chemistry, 81. Playing with Fire, 83. The Coming of the Matchlock, 83. Caps and Breech-Loaders, 85. From Henry VIII to Cartridges, 85. The Beginning of Precision in Mechanics, 87. Making Barrels, 92. Taking off 2/1000 of an Inch, 92. The Making of Ammunition Today, 94. Handling Deadly Explosives, 96. Extreme Precautions, 96. =How does an Artesian Well Keep up its Supply of Water? 96. Where do Dates come from? 97.= =THE STORY OF RUBBER= =98= How was Rubber First Used? 98. What is a Rubber Camp Like? 100. How is Rubber Gathered by the Natives? 103. How is Rubber Smoked? 104. How was Vulcanizing Discovered? 105. How did Rubber Growing Spread to Other Places? 108. How is Rubber Cured on Modern Plantations? 110. How is Crude Rubber Received Here? 112. How is Rubber Prepared for Use? 112. How are Rubber Shoes Made? 116. How are Automobile Tires Made? 119. =How did the Expression “Before you can say Jack Robinson” Originate? 119. What is an Aerial Railway Like? 119. Why are they called Newspapers? 121. How did the Cooking of Food Originate? 121. How Far away is the Sky-Line? 121.= =THE STORY OF ROPE= =122= Civilized Rope Makers, 122. Hand Spinning, 124. Machine-made Ropes, 128. American Hemp, 128. Manila and Sisal Fibers, 130. Wire Ropes, 132. Pine Tar for Ropes, 134. Why does Rope Cling Together? 136. What is Rope Used for? 136. =How did the Expression “A-1” Originate? 136. How has Man Helped Nature give us Apples? 136. What kind of a Crab Climbs Trees? 138. How are Files Made? 138.= =THE STORY OF SELF-LOADING PISTOLS= =139= Colt Pistols, 139. Machine Guns, 145. =How does the Poisonous Tarantula Live? 146. How do the Indians Live Now? 146. How does the Beach get its Sand? 149. How did Nodding the Head Up and Down Come to Mean “Yes”? 149. Why do We Call a Man “a Benedict” When He Marries? 149.= =THE STORY IN FIRECRACKERS AND SKY-ROCKETS= =150= The Need for Noisemakers, 150. Chinese Firecrackers, 150. Popular ever since the Invention of Gunpowder, 154. Beautiful Displays, 158. =What makes a Chimney Smoke? 158. What are Dry Docks Like? 161. Why does a Lightning Bug Light Her Light? 161.= =THE STORY IN THE MAKING OF A PICTURE= =162= The Image is Upsidedown, 162. Effect of Light on the Film, 163. Early Photographic Efforts, 164. Modern Photography, 168. =How Deep is the Deepest Part of the Ocean? 169. Why do We say “Get the Sack”? 169. Why do We call them X-Rays? 169. How did the Term “Yankee” Originate? 171. Why do We say “Kick the Bucket”? 171. When does a Tortoise move Quickly? 171.=