5 
traces in a downward and backward direction. On tlie other hand the pole, in 
the descent of hills, has the opposite effect on the breast harness, and moves it 
in an upward and forward direction. Consequently the brake has the happy ten¬ 
dency of correcting the latter movement and of giving more fixity to the harness. 
It must be finally noted that the conditions of draught are improved by the use 
of this brake in the following particulars: 
(a) By the introduction of swingle-trees. 
(b) By the interposition of an elastic medium between the team and the 
weight. 
(c) By the steadiness and comparative fixity of the harness in the descent 
‘of hills. 
N.B.—No detail has been furnished of the weight of the system. 
