COMPASS AND PACING 97 



as a rule to allow a pedometer to be employed. Some 

 men register double paces. Others count up to a hundred 

 in the head and take down the hundreds on a "clicker," 

 in a note book, or by breaking an elbow in a tough twig 

 carried in the teeth or hand. 



Accuracy. With all its limitations, pacing is a very ser- 

 viceable means of measurement and a man who has duly 

 trained himself can get very good results. Johnson's 

 " Surveying " says, that when a man's gait has been stand- 

 ardized and on the work he walks at a constant rate, " dis- 

 tances can be determined by pedometer or by counting the 

 paces to within 2 per cent of the truth." That refers, 

 without doubt, to open land. In woods work too there 



Section Lines 



Compass Bearings 



Pacing Traverses . 



POND SURVEYED FROM SECTION LINES BY CROSS BEARINGS AND THE 

 COMPASS AND PACING METHOD 



are many men who can be depended on for results as clbse 

 as that, but errors up to 5 per cent in a straight mile on 

 uneven land is for the writer the usual standard of work. 

 This is not serious. When the error is distributed over the 

 mile by plotting, the utmost probable error in the location 

 of any point is not over 25 yards. 



Uses of the Method. (1) The staff compass is largely 

 used in retracing old lines. Pacing may well be employed 

 with it as a means of finding blind marks and corners, for 

 this purpose replacing the chain. 



