TRACTION. 
479 
From the foregoing, it appears that the load which each horse 
should be required to draw is 
618’Olbs. for horse artillery, 
723* * * § 8 lbs. for light field batteries, 
678’61bs.* for heavy field batteries. 
This Deckerf lays down as 
500 1 0 lbs. for horse artillery, 
65O’0 lbs. for foot artillery ; 
adding that these are less than they actually would be on service; 
while Migout and Bergery, in their “ Essay on Gun-carriages,” give 
the following as the weight which each horse can draw under all 
circumstances of war :—- 
743'21bs. for light field batteries, 
878’41bs. for field parks. 
The ratioJ of the tractive force to the total load, calculated by 
& 1 
equation (2), or averages = *11441 = the tangent of an 
angle of 6° 32', nearly; and thus is in agreement with the statement in 
the “ Mathematical Course ” that “ the tangent of the inclination of 
the traces should equal the ratio of the traction to the load ”—the 
angle of inclination of the traces being 6° 30', upon which, as men¬ 
tioned in the former paper, the average resistance to rolling is based. 
To compare, now, the load calculated that each gun-team should 
draw with that which it actually has to draw, we have— 
cwts. qrs. lbs. 
Horse artillery ... 37 1 10 actual total load,§ 
33 0 12 calculated ,, 
4 0 26 difference. 
Light field battery, 42 0 24 actual total load,[| 
38 3 3 calculated „ 
3 1 21 difference. 
Heavy field battery, 50 1 9 actual total load, 
48 1 25 calculated „ 
1 3 12 difference. 
* Less than in the case of light batteries, on account of the loss assumed for the larger number 
of horses driven together. 
f “Principles and Practice of Modern Artillery,” Lieut.-Colonel Owen, E.A. 
X This ratio has been variously estimated. Rankine gives it as y x y 0 n gravel road and 4 on soft, 
sandy, and gravelly ground; Youat as on road in good repair; while Migout and Bergery state 
that in 1825, at Metz, it was found to be over fine turf and y 1 ^ over recently ploughed and hoed 
ground. 
§ With 6cwt. gun and two gunners mounted (at 13 stone each). 
|| With 6 cwt. gun and five gunners mounted. 
With 12 cwt. gun and five gunners mounted. 
