OKEHAMPTON EXPERIENCES, 1893 . 
73 
Fig. 1 is a rough drawing of the German one. It is made in two pieces. The 
bottom of the lower part AB fits on the clinometer plane and the top is formed 
on a curve, marked in hundreds of yards at the side E F and on top in degrees 0. 
The top part CD fits on the curve by means of undercut grooves and slides up and 
down the curve. 
Fig. l. 
Elevation. 
Plan. 
H 
Section of 1 
Curve 
The bubble is contained in the slide C ID and can also be made to move inde¬ 
pendently of the slide by means of a screw H. A small-scale K L registering this 
latter motion. 
To use it, the gun is first laid with the tangent scale at the elevation ordered, 
the slide is also set at the elevation ordered and the clinometer placed on the gun. 
The bubble is then put in the centre of its run by working the top screw, thus 
automatically registering the angle of sight 
Six sights with erecting eye pieces weie also tried and likewise considered a 
success, the small and darkened field being apparently more than compensated for 
by the advantage of seeing the target right side up. The trial, however, was 
very short, and, I believe, a more extended trial is to be made. These sights had 
the further advantage that the object glass, when racked in, was at the so-called 
infinite focus, thus simplifying the focussing ; it would be better still if it were 
fixed. The present sights could easily be fixed at the infinite focus by a single 
small screw put in under the ray shade. 
An improved wagon for the 12-pr. was also tried : the weight behind team is 
approximately the same as with the gun, and it is designed to carry 100 15-lb. 
shell. 
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