20 THE NEW AUSTRIAN FIELD GUNS, 
(b) The wagon (B, Fig. 20) consists of (1) the wagon body; (2) tbe 
perch, l ; (3) the axletree; (4) the wheels and spare wheel; (5) the 
break, d,f y s } h, k; (6) the ammunition boxes, a . 
(1) The body is of iron; being a framework made of U and H iron, 
consisting of a centre and side pieces, united at the rear end by a cross 
piece. The front of the frame is formed by the two side pieces being 
bent at right angles, so as to meet the front end of the centre piece. 
(2) There, in order to form the perch , they are again bent at right 
angles, and run close to and parallel to each other towards the front, where 
(l, Fig. 20) they are again bent—this time downwards—so as somewhat to 
resemble the trail of a gun, and, as in that case, the ends are covered with 
a shoe carrying an eye for limbering-up, as well as with a handle on each 
side. 
(3) About the centre of the body the axletree is secured. This is very 
similar to the axletree of the gun or limber, but not interchangeable. 
(4) The wheels are the same as those of the limber. 
A spare gun wheel is carried underneath the body, as follows:—An iron 
block, resembling an axletree arm, and furnished with linchpin and washer, 
is secured to the centre cross piece of frame. Over this the pipe-box of the 
nave of the wheel is fitted, and the linchpin put in; the wheel is then 
tightly secured in its place by rope lashings, which pass through loops 
secured for the purpose to the under side of the frame. 
(5) The break consists of (1) the iron breakshoe, f 3 furnished with 
wood blocks, which is supported by (2) the hanging pieces, d, so as to be 
capable of movement in the vertical plane. (3) the break bar, m, is 
attached to/*, and has on its rear end a threaded socket (which in Fig. 20 is 
nearly obscured by the rear view of wheel). Into this socket screws- (4) the 
male screw, g , of spindle, g> which also passes through the fixed nut, h. 
Two projections on the spindle prevent any rectilinear motion of the same, 
though not interfering with freedom of rotation in the fixed nut. Upon 
the rear end of this spindle is the break handle, k. 
Suppose we turn this handle to the right ; then the screw, g, rotates in 
the threaded socket of break bar, m } and, as the latter cannot turn round, 
the bar, m, is forced to move towards the rear, pressing the break-shoe with 
its wood blocks tightly against the circumference of the wheel. 
By turning the handle to the left, the break is loosened. 
(6) The ammunition box is placed on the body, above the axletree, with 
its centre rather towards the front of the latter. It consists of a large box of 
iron plate over an iron framework, and is divided lengthwise (across the 
wagon) into two portions by an iron diaphragm. Each of these portions 
resembles exactly one of the limber boxes already described (p. 18), except 
that each half has only five instead of six recesses and drawers, as the two 
lowest are thrown for convenience into one larger drawer. The top is also 
of iron plate, somewhat domed, and surrounded by an iron rail, b 3 and in 
two corners are secured by straps six horse-pickets (cc, Fig. 20). 
The remainder of the space on the top would be devoted to forage, a 
