434 
APPENDIX NO. XY. 
1855, May 19. 
Vibrations. 
Arc at beginning. 
7° 22-4'. 
Arc at end. 
Time of one vibration. 
.14*8134s.... 
Temp. 
... 28° 
7 22-4 . 
. 2ft*f» 
7 22-4 . 
.14-7917 ^ 
28* 
14-8078 
28*2 
Distance of magnets. 
9 inch. 
Deflections. 
Double angle of deflection. 
Temp. 
... 27° 
13 “ . 
29 13-50 . 
The time of one oscillation is always the mean of ten observed 
intervals between fifty oscillations of the magnet from the right to the 
left, and fifty from the left to the right. 
By the observations of deflection, the two magnets are always under 
right angles upon another. 
The magnet used for deflecting and oscillations was A 67. 
Three observations, 1854, June 9, 14, and 26, gave the mean varia¬ 
tion or magnetic declination, 1854, June 16, 108° 21*5' W. 
1855, June 21. 
Hakluyt Island . 
Vibrations. 
Arc at beginning. 
Arc at ond. 
Time of one vibration. 
Temp. 
7° 22-4'. 
7 22-4 .5 39-7 .14-0518 .33-3 
7 22-4 .4 28-6 .14-0600 .33-8 
14-0525 
33-5 
1855, July 19. 
Coast between Parker Snow’s 
Point and Cape York. Lat. 76° 3'; long. 68° O'. 
Vibrations. 
Arc at beginning. 
7° 22*4'. 
Arc at end. 
Time of one vibration. 
Temp. 
4AO 
7 22-4 . 
A 1.R 
7 22-4 . 
A_1 -9 
7 22-4 . 
12-9911 
40-5 
The above observations were made with a unifilar magnetometer, 
lrindly loaned by the United States Coast Survey, and a Barrow’s dip- 
circle, received from Professor Henry, of the Smithsonian Institution, 
through the courtesy of Colonel Sabine. The observations were made 
by Mr. Son tag. 
E. K. K. 
