NORTII PACIFIC.
Latitude.
Nordi.
28« 22-
28 52
do.
do.
34 51
do.
do.
35 11
do.
38 55
do.
53 12
do.
do.
do.
Longitude.
YVest.
172 17
173 9
do.
do.
194 21
do.
do.
194 39
do.
196 12
do.
163 39
do.
do.
do.
150
400
600
784
320
575
760
150
250
180
380
100
200
356
456
Tempe.
rature.
57.
47.
41.
42.8
54.7
43.
43.5
62.
57.2
44.
41.5
39.
39.7
40.7
40.
Temperature.
76.5
78.
do.
do.
78.
do.
do.
72.
do.
61. ,
do.
47.5
do.
do.
do.
'June, 1826,
do.
do.
do.
do.
do.
do.
do.
du.
do.
do.
Oct. 1826.
do.
do.
do.
L.ititude.
North.
58 48
do.
do.
do.
61 10
do.
do.
do.
do.
do.
do.
do.
do.
70 2
Longitude.
YVest.
184 58
do,
do.
do.
183 28
do.
do.
do.
do.
do.
do.
do.
do.
164 40
No. of
Fathoms
JOO
200
327
442
5
10
20
20
30
30
52
100
200
21
Tempe.
rature.
45.
41.
40.,
40.5
41.5
38.
29.5
30.5
30.5
30.5
82 5
32.5
.32.5
37.
54,
do.
do.
do.
43.5
do.
do.
do.
do.
do.
do.
do.
do.
49.
July, 1827,
do.
do.
do.
do,
do.
do.
do.
do.
do.
do.
do.
do.
Aug. 1827,
TABLE XI.
T iif Dips in this table were observed with tlie instrument th a t accompanied th e E xpedition to Melville Island. I t h ad two
imnion needles, and another with a moveable weight fitted upon Professor Maye r’s principle.
No. 1 was used solely'for observations on tb e magnetic intensity, and its poles consequently were never rev ersed ; while
I. 2 and M aye r’s were employed for Dip s, and h ad th e ir poles changed a t each observation. T b e horizontal needle was sus-
piidcd in a s tirru p by a fine silk, in an octagon wooden box, furnished with a g ra d u a ted circle on th e inside, and covered with
glass top, in which there was fitted a contrivance for moving th e needle o u t o f the mag. meridian.
Until th e arrival o f th e ship a t YVoahoo, ray stay a t each place was too short, and my time too fully occupied with astrono-
lical observations and with th e business of surveys, for me to give the necessary attention to these delicate observations; b u t
fter th a t period the observations were reg u la rly made. U n fo rtu n ately for th e completion o f the series upon th e magnetic
iteiisity, th e needles used for th a t purpose became corroded upon tho passage from Loo Choo to P e tro p a u lsk i; by which their
Kignotic power was much dim in ish ed ; an d as th e amount of th e change could not be ascertained, I have th o u g h t it advisable
ot to incumber th e table with th e observations, those witb th e liorizontal needle excepted.
1827.
1820.
1827.
1827.
1826.
I827.
1826,
1827.
N.YV. America,
Cliamisso Island;
England, .
Petropaulski,
San Francisco,
Dl.acao,
Woahoo,
Loo Clioo, .
Acapulco,
Latitude.
North,
70 31
66 12
Eg
53 01
3 7 48
22 12
21 18
26 12
16 Í30
Longitude.
YVest.
No. 2.
No. 2.
No. 2.
M.
M.
Dlaver.
D¿.
JI.
M.
fNo. 2.
I M.
JM.
1 M.
( No. 2.
\ M.
( N o. 2 .
f No. 2.
1 No. 2.
Í 1N 0 2
I No. 2.
f No. 2.
I No. 2,
rM.
Jm.
Im.
No. of
Readings.
Ylarked end, N. Pole. .Ylarked end, S. P.ole. ■
r .
wn.
Dip.
N.
Mean Dip.
N.
YY'.
Up.
YV.
Down.
• YV.
Up.
Y1
Do
0 0 0 0 0
56 85 33.9 73 36 85 29.2 76 45 81 03 81 03
80 80 39 73 13 83 35 74 10 77 44'
60 Mean. 76 36 78 42 Mean. 77 39
88 85 16 70 12 91 21 66 12 77 47
217 84 28 70 43 91 06 66 12 77 40 77 39
80 108 14 51 45 121 18 43 51 77 22
170 108 11 51 46 122 36 43 46 77 40
100 Vib. in mag. mev. 590 16 s. Perpend. 597s, 1 77 40.
72 75 43.1 62 23,3 76 27 65 45.1 69 58 69 58
48 65 15 57 39 68 49 i 62 41 63 49'
48 70 31 56 29 70 19 ; 59 59 64 09
48 70 30 56 32 70 20 60 01 64 11
71 14 56 41 70 02 59 34 64 05 64 02.3
Í10’ 96 26 4« 50 9 7 00 49 24 63 38
100 Vib. in mag. mer. 497s. 9 Perpend- 523.<. 4 64 22 J
80 63 38 54 25 68 03 61 24 62 64 68 44 2 7 , 60 47 66 41 1 54 15 62 .54 62 35.2
92 63 35 54 15 66 46 1 61 52 62 25^
32 25 34 . 18 55 3 7 31 ' 31 56 29 58 Ì
32 25 3 7 : 19 09 3 7 19 ! 31 55 29 57 29 57.5
32 41 32 32 50.5 47 13 , 40 00.5 40 3.5 1
32 41 30 32 53 47 16 » 39 54 40 31 I 40 33
04 . 43 25,5 37 32.3 32 12,6' 27 07.2 35 14.4 1
96 42 47.8 37 05 31 56 2 27 036 34 49 1 35 01.7
100 41 12 31 30 45 10 ■ 37 40 38 57'] 40 41 11 31 26 45 0] 1 37 45 38 > 38 58
40 41 19 31 43 45 05 ! 37 45 39 02 j
i m