m 
Viezv of Mr Barlow's Magnetical 
The preceding is a copy of an extract from the journal of the 
vessel, showing the courses, &c. as kept both by the corrected 
and un corrected compass, and the amount of errors corrected by 
the plate. 
The course, according to both reckonings, is shewn in Fig. 5. 
and the numerical results will stand as below : 
Course and distance made good between the observations on the 25th and 26th 
of May 1823 : 
Course = S. 85° E., distance 50 miles. 
By the Plate compass course — E. distance 51 miles. 
By the Compass without \ 
the Plate j ^ ourse — distance 58 miles. 
Latitude observed May 26. =r 69° 12' 10" N. ; Longitude by Chronometer 
10° I P E, 
Latitude by the Plate Compass = 69° 16' 00' N, ; Longitude 10° IT' E. 
Latitude by the Compass ) 
without the Plate, J 
Making a difference in the latitude of 35 miles. 
— 69° 47' 00" N. ; Longitude 10° 11' E. 
The following Table shews the local attraction of the Griper f 
as ascertained by swinging her at Hammerfest, and the second 
Table shews the same when the plate was fixed. 
Hammerfest , Latitude 70° 40' N. Longitude 23° 45' E. Variation 11° 26' W. 
Dip 77° 
1 5' N. 
1 Position 
Compass 
Correct 
Position 
Compass 
Correct 
of 
Ship’s 
or deviated 
Bearing of 
Magnetic 
Bearing of 
Attrac- 
tion. 
of 
Ship’s 
or deviated 
Bearing of 
Magnetic 
Bearing of 
Attrac- 
tion. 
Head. 
Object. 
Object. 
Head. 
Object. 
Object. 
South 
S 58 30 V/ 
S 62 30 W 
O / 
— 40 
North 
S 6130 W 
S 62°3oW 
o / 
— 1 30 
S by W 
63 40 
do. 
4- 1 10 
N by E 
57 50 
do. 
— 4 40 
SSW 
67 0 
do. 
-j- 4 30 1 
NNE 
53 40 
do. 
— 8 50 
SW by S 
70 50 
do. 
+ 8 20 
NE by N 
49 0 
do. 
— 13 30 
SW 
„ • • ( 
do. 
NE 
43 0 
do. 
— 19 30 
SW by W 
79 0 
do. 
4- 16 30 
NE by E 
42 30 
do. 
— 20 0 
wsw 
81 40 
do. 
+ 19 10 
ENE 
41 0 
do. 
— 21 30 
W by S 
83 0 
do. 
4- 20 30 
E|N 
38 40 
do. 
— 23 50 
West 
86 40 
-do. 
4- 24 lOj 
E \ S 
38 20 
do. 
— 24 10 
W by N 
87 o 
do. 
+ 24 301 
E by S 
37 0 
do. 
— 25 30 
WNW 
85 30 
do. 
4- 23 0 
ESE 
39 40 
do. 
— 22 50 
NW by W 
81 30 
do. 
4- 19 Oj 
SE by E 
41 40 
do. 
— 20 50 
NW 
• • . . 
do. 
SE 
44 0 
do. 
— 18 30 
N W by N 
77 0 
do. 
4- 14 30* 
SE by S 
47 40 
do. 
— 14 50 
NNW 
71 40 
do. 
4- 9 lOj 
SSE 
49 40 
do. 
— 20 50 
N by W 
69 0 
do. 
4- 6 301 
S by E 
56 15 
do. 
— 6 15 
Note . — The dip is supplied by Captain Sabine throughout. 
