LAYING- GUNS BY TELESCOPE. 
405 
35qtl 
rat¬ 
e's 
iTh 
Fig. 2. 
It is in order to show the extreme importance 
of laying the first two rounds in precisely the 
same manner, that I have been so particular in 
describing the manner in which the deflection is 
corrected. 
We may say then, that the best “ layer ” is he 
who groups his shots best. A gunner who 
always lays lays 20 metres to the right of the 
object, may have his first shot to the right, but 
when the deflection has been accurately corrected 
after the second round, all his subsequent shots 
will be in the right direction. He is very 
superior to one who always lays near the object, Uniformity 
with an error of 3 or 4 metres. If the deflection mo?Jim P or 
has not been accurately corrected, the grouping 
of the shots will be, not round the object, but accuracy, 
round a point on the prolongation of the line of 
sight, which in this case has not been directed on 
the object. 
INSTRUCTION IN THE USE OE THE TELESCOPIC APPARATUS EOR LAYING FIELD 
GUNS OF 90 mm , 80 mm , 95 mm , AND 7. 
The apparatus, of which sections are subjoined, is mainly composed General 
of a telescope with moveable cross-hairs fixed by means of six screws of the tele? 
on an iron rest about 1 metre long; the lower face of the rest is pro- ®™^ c atus 
vided at one end with a spring made to fit accurately into the hole at 
the top of the “ Broca” foresight of the 90 mni gun. The dimensions of 
this instrument admit of its being used also with guns of 80 mm , 95 mm , 
and 7. 
The other extremity of the “ rest” has a projection underneath in 
the shape of an inverted V, which serves to keep it steady on the eye¬ 
piece of the tangent-scale. 
The telescope screwed on its rest is placed in a box which, on the carriage 
line of march, is carried on the foot-board of the limber, close to the 5^®™ tE* 
ammunition-boxes, but separated from them by two springs which march, 
serve to deaden the shocks occasioned by the jolting of the carriage. 
To place the instrument on the gun, the point of the spring is passed placing the 
through the hole in the fore-sight and pushed gently forward until the J^t^gun. 
heel of the “rest” comes in contact with the fore-sight, the inverted 
V at the other end of the “ rest” will then fit on to the head of the 
tangent-scale. 
To remove the instrument the spring is slightly pressed, and the Takingitoff. 
“rest” drawn back till the iron point is disengaged from the orifice of 
the fore-sight. 
50 
