238 B GEOLOGICAL SURVEY OP CANADA. 



The difference between observations on Polaris and Altair at Ja-lmi River is 40", 

 Half the difference may therefore be added to the present latitude to correct for errors 

 presumably in instrument, as shown by this discrepancy : — 



54° 10' 39" 

 20" 



54° 10' 59" 



LONGITUDES. 

 Anchor Cove, Skidegate Inlet. 



Longitude, 132° 14' 19" 



Determined in 1866 by D. Pender, Master R. N., and given on Admiralty Chart 

 No. 48 of Skidegate Inlet. This is unquestionably the best determined longitude on 

 the islands. 



Forsyth Point, Houston-Stewart Channel. 



Longitude, 131° 11' 30" 



Determined by examination of track survey and long bearings taken on outlying 

 points proceeding from Skidegate. The scales for the successive parts of the survey 

 are ascertained from the latitude observations taken, and from these, by the method 

 of latitudes and departures, the longitude given above has been worked out. 



The A-alues of this longitude, determined in various ways, are given below : 



srs. Inskip, Gordon and Knox, of H.M.S 

 as given on Admiralty Chart No. 2168. 



131° 09' 0" S Messrs. I ns kip, Gordon and Knox, of H.M.S. Virago, in 1853, 



Calc 



and reducing by scale given by latitude observations. 



, Calculated by ascertaining true departure on track survey, 



.' 29"| 



131° 11' 33" \ Same method. Survey followed round by Bluff Point. 



C Calculated from long bearing, north end Burnaby Island to 



Bluff Point, and by departure on track survev for re- 

 131 13' 23" J 



'. mainder of distance ; total departure reduced by scale 



given by latitude observations. 



The longitude given by Messrs. Inskip, Gordon and Knox is presumably too far 

 to the east, as the whole of the east coast as fixed by them is 13' east of its true 

 longitude on the average. 



Camp, Aug. 8, near Fife Point. 



Longitude, 131° 38' 0". 



Determined by bearings on Mount McNeil and mountain at north end of Ste- 

 phen's Island. The positions of these mountains are given on Admiralty Chart No. 

 1923, A., from surveys by D. Pender, staff commander, R. N., 1867-70. The bearings 

 have been laid down on this chart, and as the latitude of the camp is known, its 

 longitucfe as given above has been determined by a method of minimum error. 



