Xll TABLE OP CONTENTS. 



CHAPTER V. 



TAKING MEASURE FOR THE BIT THE MOUTH-GAUGE 

 THE TRIAL-BIT. 



Description of these instruments, and methods of using them 



199-205 



PART III. 



DRAUGHT AND HARNESS. 

 CHAPTER I. 



INTRODUCTORY. 



The true principles of harnessing horses very unequally acted on 

 What suits a town or city may be and often is inapplicable to 

 rural districts, and vice versa The condition of the roads, and 

 the whole conformation of the country, must be taken into 

 consideration The two main points to be attended to are the 

 size of the horse and the height of the wheel . . 209-211 



CHAPTER II. 



THE ANGLE OF TRACTION THE COLLAR THE HAMES THE TRACE 

 THE POLE AND POLE-CHAINS THE HEIGHT OF THE WHEEL. 



The best direction for applying power to a common wheel is in 

 the horizontal line, supposing the power itself to be capable 

 of being exerted in all directions with equal facility This is, 

 however, not the case with horses, whose draught-power is 

 best exerted at an angle with the horizon, on account of the 

 inclination of the shoulder-blade, from which the draught is 

 exerted through the collar, &c. Experiments of General 

 Berge on this subject The trace should be perpendicular to 

 the collar and shoulder-blade, and consequently neither 

 horizontal nor even parallel to the surface of the road when 



