352 
THE WELDON RANGE-FINDER. 
stride, and I then send them down the 100 yds., recording the result. 
They do this daily, and the result is recorded, and I gather from the 
record which men I can rely on. I find a man whose natural pace 
varies little generally is most correct in pacing yards, while tall men 
who may naturally pace longer than a yard require most practice before 
they become reliable. 
I copy a few entries to show how I record this pacing :— 
Name. 
Height. 
Natural 
pace. 
Pacing 
yds. 
Natural 
pace. 
Pacing 
yds. 
Pacing 
yds. 
Natural 
pace. 
Corp. E.... 
Short. 
110 
106 
104 
105 
102 
105 
Br.W. ... 
Tall. 
99| 
103 
98 
98 
105 
97£ 
Br. C. 
Short. 
111 
101 
110 
100 
101 
109 
G-ood. 
Br. K. 
// 
112 
107 
110 
104 
101 
109 
Br. H. 
U 
105£ 
104 
105 
102 
1001 
105 
Very good. 
I have now several shortish men, generally driver N.-C.-O's., who 
on flat good ground can pace yards with very considerable accuracy. 
The instruction each day is commenced with this practice. 
Next, in order to show the men what they are expected to do, two 
instruments are correctly laid at each end of a base, reflecting some 
well-defined object. It is explained to them that 20 times the distance 
between the two instruments is the range of the object, and they look 
in the instruments and learn how they are expected to lay. 
Each man is then taught to find the range of some moderately dis¬ 
tant object single-handed. It should at first be a very well-defined 
object, such as the edge of a house, &c. The man has two poles, a 
measuring reel, and an instrument. He presses one pole firmly into 
the ground, as perpendicularly as possible. A runs off to the right and 
finds any point B , when he sees the object, 0, reflected along BX. 
o 
Then he plants another pole and runs along the line BX until, on 
turning-about, he finds some point, C, where the reflection of the object 
and A and B are all in one line. Here he makes a mark on the ground, 
