I
THE HONGKONG GOVERNMENT GAZETTE, 13TH APRIL, 1889.
317
30. The observations of magnetic declination and horizontal force were made with the unifilar magnetometer, ELLIOTT BROS. No. 55, and the dips were observed with dip circle, Dover No. 71. The methods adopted are explained in Appendix G. of Observations and Researches made in 1885. The value of log K was 3.44975 at 27° cent. and the value of P was + 6.608. The mean value of the magnetic moment of the vibrating needle was 0.48203 in British Units and 629.32 in C.G.S. Units.
The times of vibration exhibited in the table are each derived from 12 observations of the time occupied by the magnet in making 100 vibrations, corrections having been applied for rate of chrono meter and are of vibration. The observations of horizontal force are expressed in C.G.S. Units, but the monthly synopsis exhibits X, the horizontal as well as Y, the vertical, and the total forces, which have been computed by aid of the observed dips, and their values are also given in British Units and in Gauss's Units. The declination and dip are decreasing, while the horizontal force is increasing as well as the total force. Observations made before the Observatory was founded show that the dip was increasing during the forty years previous.
OBSERVATIONS OF MAGNETIC DECLINATION AND DIP.
1888:
H.K.M.T.
Declination, East.
Observer.
H.K.M.T.
Dip, North.
Needle.
Observer.
January,
164 2h 38m. p.
0° 43′ 21′′
F.G.F.
174 3 33. p.
February,
14
2 31° p.
0 43 56
15
3
2 p.
32° 22' .89 24 .53 21 .02
No. 1
F.G.F.
2
"""
1
"
21 .40
2
19
March;
14 2
40 P.
0 43
Co
3
M.A.
15 3
30 p.
19 .56
M.A.
20.03
2
"J
April,
16
36 P.
May,
15
N
33 p.
July,
17 2
36 P.
0 38
0 39 49
0 39 38
9
14
3
28
""
A
p.
21 .34
1
20.06
2
F.G.F.
17 3 23
p.
23 .12
22 .33
M.A.
18 3 23 p.
19 .37
F.G.F.
M.A.
16 .78
August,
14 2 28
September,
14 2 38
October,
November,
15 2
2008
p.
0 39 54
"
15 3 27 p.
18.11
13 .31
p.
0 40 11
15 3 2 p.
20 .18
20..88
p.
0 42 4
F.G.F.
16 3 37 p.
22 .51
19 .30
14 2 45 p.
0 43 13
M.A.
16
3
29 p.
26 .75
30 .21
17 3
22 p.
December,
14 2 47 p.
0 39 40
F.G.F.
15 3
Å Å
2 2
26 .00
22.32
10 p.
22 .39
18 .59
16 3 28 p.
22 .93
22 .24
2121~-~1~50-250
1
99
F.G.F.
وو
M.A.
F.G.F.
W.D.
M.A.
F.G.F.
OBSERVATIONS OF HORIZONTAL MAGNETIC FORCE.
Time of
DATE.
1888.
Tem-
one
H.K.M.T..
Vibra- tion.
perature Log mX.
Cent.
Value of
m.
Distance in
H.K,M.T.
Centi-perature
Tem-
Cent.
m
Deflec- tion.
Log
Value of X.
Obser- ver.
Mean.
meters.
8
January 16,... 3h. 3m. p.
February 14,... 2 54 P.
1
March
April
14.... 3 23 p.
17,... 2 46
p.
May
July
15,... 2 58 P.
17,... 3 12 p. 3.5349
August 14,... 3 0 p.
September 14,.... 3 16 p.
October 15,.. 2 55 p.
November 14,........ 3 D p.
December 14,... 3 18 p.
3.5171 249.0 2,35929 633.93
3,5119
3.5186
3.5181
3.5252
3h. 33m.
p.
30
229.3
40
á,
- 16 .55 2.35952
25 .3 2.35925
22 .3 2.35892 632.40
30..2 2.35851 631.80
31 .4 2,35666 629.20
3.5348 30.2 2.35623 627.99
3.5392 30 .5 2.35492 626.89
3,5410 29 .3 2.35418 625.35
3.5399 25, 1 2.35359 624.47
3.5407 23. 45 2.35313 623.95
633,51
633.07
3 24 p.
30
16. .0
7° 28' 6" 3 8 C 7 28 35
3.24480
0.36077
F.G.F.
3.24400
0.36121
40
3 8 10
4 14
p.
30
22 .4
40
3
3 17
p.
30
21 .1
7 26 50 7 36 7 26 32
3.24364 0.36124 M.A.
3.24307
0.36134 F.G.F.
40
3 7 27
3 32
P.
30
28 .5
7 24 50
3.24265 0.36135
40
3
6 36
4 7 p.
30
29 .9
7 22 45
3.24091
0.36130 M.A.
40
3
5 44
3 50
30
28 .5
40
4 13 p.
30
29 .1
40
7 21 51 3 5 17 7 21 16 3 5 15
3.23967
3.23948
3 29 p.
30
27..6
7 20 20
0,36164
0.36118
3.23807 0.36145 F.G.F.
!)
40
3 4 42
4
10
5
p.
30
23 .2
7 20 22
3.23742 0.36147 M.A.
40
3 4 51
3 47
p.
30
21 .8
7 20 21
3.23716 0,36140 F.G.F.
40
3
4 50
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