78 HINTS TO TRAVELLERS. 
ing course through the valley at the foot of the hill D, and so past Ouf 
last camping-ground. 
Bearings taken at E : C 236° 30', and southern end of summit of same 
range, H 215°; D 174°; B 168°; A146°; G 133°; F118° 30'. All bearings 
magnetic. 
June 4th , 8 a.m.— Aneroid, 24*65 inches; temperature in shade, 66° 
Fahr. Set out in a N.W. direction, and haying no prominent object in 
view on the line of march, I noticed the direction in which my shadow 
was cast, and by this means, allowing for the sun’s apparent motion, I 
avoided making any general deviation from the direction in which I 
wished to travel. Arriving at a small lake, we camped, having come an 
estimated distance of twelve geographical miles. Fixed the position of 
the lake by bearings of C and E.* Aneroid, 25*50 inches; temperature 
in shade, 70° Fahr. 
Bearings taken at camp, near lake: C 195° 30'; H 185° 30'; E 113° 30'. 
All bearings magnetic. 
To Plot the Bearings .‘—This can be done either on the true or magnetic 
meridian. The bearings being magnetic, it saves much trouble, and also 
chances of errors, to plot them from the magnetic meridian. 
Through the station A dra^v with a pencil a line to represent the 
magnetic meridian in a direction convenient for the route. Place the 
protractor with its centre mark on A, and the 360° on the magnetic line, 
and set off the bearings observed. 
The second camp being in the direction of hill E, measure 15 miles, on 
the scale adopted, on the line drawn toward E, which will give the position 
of Camp 2. 
From this position lay off the bearings obtained, in a similar manner, 
having first drawn a magnetic meridian through it parallel to the first. 
The intersection of two lines of bearings of any one point, as taken from 
two different stations, will fix the position of that point with reference to 
the stations. If the true meridian is used, the procedure is the same, but 
each bearing must be corrected for the variation before laying-off, which 
can be approximately ascertained from the variation map facing p. 82. 
The line drawn through A will then represent the true meridian. In 
* Take 180° from O for its opposite bearing. Add 180° to E for its opposite 
bearing. 
