CONTENTS XI 
Page 
Chapter XI. Sleds and Sled-IIauling 157 
The Go-devil 157 
The Lizard 158 
Yarding Sleds 1 58 
The Bob 161 
The Jumbo 161 
The Two-sled 161 
Sled Roads 164 
Log Haulers 178 
Chapter XIL Wheeled Vehicles 184 
Two-wheeled Vehicles 184 
Wagons 189 
Traction Engines for Wagon Haul 196 
Motor Trucks 198 
Chapter XIIL Tractors 204 
Chapter XIV. Power Skidding 214 
Cableway or Overhead Skidding System 214 
The Snaking System 229 
The Slack-rope System 232 
Swinging and Roading 245 
Fuel Requirements 249 
Spark Arresters 251 
Electric Drive 252 
Chapter XV. Aerial Tramways 255 
Chapter XVI. Timber Slides and Chutes 262 
Types 262 
Grades 271 
Curves 272 
Operation 273 
Chapter XVII. Forest Railroads . . . 278 
Pole Roads 278 
Stringer Roads 281 
Steel-rail Roads 283 
Advantages of Railroad Transportation 283 
Choice of Gauge 285 
Rights-of-way 286 
Location 287 
Chapter XVIII. Railroad Construction 293 
Clearing the Right-of-way 293 
Fills and Cuts 294 
Movement of Earth 297 
