CONTENTS.

Self-acting Planes . . .

Fixed Steam-Engines . .

Horses .

Loco-motive Engines .

Adhesion of Wheels

Consumption of Fuel with differentWheels

Amount of Friction

Consumption of Fuel with different LoadsEffective PerformanceTable of the relative Performance ofHorses and Loco-motive Engines .

3

Pas«

221

223

230

240

242

252

258

263

270

278

CHAPTER IX.

Comparative Resistance of Canals and Rail-Roads . 302Table of the relative Performances of Horses uponCanals and Loco-motive Engines upon Rail-Roads .... 310