Fisher o« Me Variation of the Compass. 93 



REMARKS. 



By Walker's Compass. 



By Kater's Compass, (No. 1 .) 



In both cases the compasses agreed with the binnacle com- 

 pass. Previous to tacking this afternoon, a point of land bore 

 EbN. ; and when the ship was round, it bore SEbE., making 

 a difference of no less than four points in the direction of the 

 needle, arising from the different position of the ship's head. 



By Walker's Compass. Laying too in a very heavy sea. Di- 

 rection ship's head by azimuth compass S. 75° E. 



By Kater's Compass, (No. 2.) Agreeing with the binnacle 

 compasses. 



By Kater's Compass. On a rock at Observatory Isle. 



Ditto. 



By Walker's Compass, taken on the ice. 



By Kater's Compass (No. 1.) ditto. 



By Kater's Compass (No. 2.) ditto. 



After these observations were made. Walker's Compass was 

 removed on board the ship, to observe what difference it would 

 shew there from Kater's Compass left on the ice were the 

 azimuths were taken. Walker's Compass was placed on the 

 companion ship's head at the time E.N.E. 



O Azimuth on board,' N. 38.30 W. — 38.45 — 38.45 

 Ditto on the ice, N. 28.44 W. — 28.39 — 28.29 



Diff. 9.46 10. 6 10.16 



From these observations it appears, azimuths taken on the 

 ice free from the attraction of the ship, would have given 10° 

 more westerly variation than those taken on board with the 

 ship's head in direction E.N.E, 



By Kater's Compass, (No. 1.) On the ice. 



Ditto, (No. 2.) 



