Magnetic Needle as observed on Ship-loard, 



285 



Voyages to the Greenland or Spitzlergen Whale Fishery; iv'ith a 

 discovered in the Indications of the Mariner's Compass on Ship- 



Errors produced in the observed 



variation by the attraction of the 



ship on compass needle. 



Errors attri' 

 buted to the 

 position of 

 the ship's 

 head. [Diff. 

 of col. ^rm. 

 and IX.] 



Differeuces 

 produced by 

 a change in 

 the position 

 of the ship's 

 head. [From 

 coi. Tin.] 



DiUereaces 

 produced by 

 a change in 

 the position 

 of the com- 

 pass. [From 



col. VIII.] 



T3 g 



Situation of the compass by which 

 the Sun's azimuth was observed, 

 [col, VI.] 



X. 



H" 0' 

 ]7 







4 30 

 3 4^5 



13 J 



2 



15 

 5 30 



2 S 

 14 49 



13 41 \ 

 13 G 



13 9 



1 24 

 8 51 



3 •?A 

 25 G 



XI. 



3» 15' 



6 30 

 3 



XII. 



31° 0' 

 17 



°1 



1 45 



28 30 



26 15 

 11 45 



12 15 



28 30 



XIII. 



S. by E. 

 S. by E. 



S. by E. 



w.is.-i 



East. J 

 East. ( 



E. §S. 



E. iS. 

 E. by S. 



NE. ^ E. 



NNE, 



NN.E. 

 South. 



South. 



South. 

 South. 



South. 

 South. 



Starboard side of the main deck. 

 Larboard ditto. 



Centre of main hatches. 



On the binnacle amidships of the 

 quarter-deck, 1 ft. from tafFrail. 



Compass on a stand on the middle 

 of the quarter-deck, 6 feet abaft 

 capstern cpindie. 



Starboard side of the main deck. 



Larboard side of the main deck. 

 On the binnacle, lO ft. from taffrail 



Ditto. 



Ditto. 



Starboard side of the main deck. 



Larboard ditto. 



Starboard side of the main deck. 



Larboard ditto. 



Centre of main liatches. 

 Centre of fore-hatches. 



Larboard side fore-castle near the 

 windlass end. 

 Starboard ditto. 



From 



