QUEEN CHARLOTTE ISLANDS. 239 B 



Jal-un River. 



Longitude, 132° 42' 15". 



Determined by bearing of N. 30° W. (magnetic, August 23, 1878,) to Cape Kai- 

 gani, Alaska. The longitude of this cape is 132° 43.8', as ascertained by the United 

 States Coast Survey (Alaska Coast Pilot). The latitude of Ja-lun River being known 

 the longitude has been determined from the above observation. 



From the above longitudes a scale has been determined for the track survey of th e 

 north coast of the Queen Charlotte Islands, and the longitude of North Island and 

 Cape Knox has been ascertained by making use of the same scale for the part of the 

 survey west of Jal-un River. 



Longitudes on the West Coast. 



The longitude of the mouth of Skidegate Channel, which opens on the west coast, 

 has been found from track survey by means of a scale adapted from those found for 

 other parts of the island. The general form of the coast has been determined from 

 bearings given in the works of Vancouver and Dixon. From these data it is found 

 that the position of Port Kuper is too far to the east. The longitude of Sansnm 

 Island, as ascertained by G. Moore, master of H.M.S. Thetis, in 1852, and given on 

 Admiralty Chart No. 2168, is 132° 9' 40". This now becomes 132° 20' 0". 



The error in the former value corresponds with that of 13' which is found to exist 

 along the east coast of the islands in charts made before 1854. The value now given 

 is probabty less rather than greater than the true amount ; and it corresponds well 

 with Vancouver's and Dixon's bearings along the west coasts when the magnetic 

 variation is correctly allowed for. 



