24 



Report on the Magnetic Survey. 



[No. 1. 



Angles 



ABC = 76° 12' 4" 

 BEA = 95° 35' 11" 



BAE = 8° 12' 45'' 



== BAG + CAE 

 BAG = 4° 9' 50" 



OAE = 4° 2' 55" 



_>A 



Length of B C » 113 meters. 

 CE= 113 „ 

 BE= 226 „ 

 Bearing of the line AD 350° 5' 



i. e. S. 29° 55' E. to N. 29° 55' W. 



These triangles give the following values for the real breadth, 

 represented by the line AD. 



Meters. 



A BAE gives AD = 1531.5 



A BAG 

 A CAE 



= 1531.7 

 = 1526.5 



Mean 1529.9 



This line is to be reduced by 42.9 meters, the theodolite not 

 standing close to the high water mark on the left shore, and to be 

 augmented by 22.3 meters on account of the instrument's position 

 on the right shore, therefore we get as the resulting breadth from 

 one high water mark to another, 1509 meters, 4951 feet. 



