5
233
18. As stated in the "Instructions for making Meteorological Observations, etc.," (Kelly and Walsh, 1892) meteorological instruments forwarded by observers who regularly send their registers to the Observatory, are verified here free of cost. During the past year, 2 barometers, 3 aneroids, 13 thermometers and 1 raingauge were verified. In addition a large number of marine barometers and aneroids on board ship were compared, indirectly, with the Observatory standard.
19. The following table shows the spectroscopic rainband as observed daily at 10 a. value for the year was 2.6:
Date.
Jan.
Feb. Mar.
Table III.
Rainband in 1893.
The mean
Apr. May. June. July. Aug. Sept. Oct. Nov.
Dec.
1,
2,
0
2
3,
1
2+
4,
1
1+
5,
I+
6,
1
7,
2
8,
2
9.
10,
1+
3
+
11,
12,
2
13,
3
14,
+
1
15,
16,
17,
18,
19,
3
20,
21,
22,
23,
24,
2
25,
2
++ 1 ++11
2+
26,
27,
2
28,
3
29,
3
30,
3
++1
3
2
3
3
jd Jeant, pred par NO CO N, CO CO CO DO 2 00
2
3
4+
3
3
3+
3
3
3.
2+
2+
4
1
1
2
+
3
3
3
:+
1+
1
+++
0+
2+
3
3
1+
10 10 4 50 1 20 10 CO Co
2
2
+ 1 + 1
3
3
je pod p T © 21 00 00 en en en ça 00 01 00 TH
+
2
3
1+
3
3+
2+
3
2+
NNN—OH—I— — en að DE DE DE CO Tel að eg on 03 00 — on en ça to ca
+
co co jà i co co co co i co co co co 1.00 00 03
↑+
3
+1
3+
3+
+
3
4+
3
3
++
+1
3
+
2
2
2
1+
1+
14
1
1+
2+
2
1
2+
1
2
+
1
1
1+
3+
3+
3
3
2+
+ ||| ++
2
2
1
1+
1+
2
2
2+
2+
++ |
1
1+
I
1
3
2
0+
3
1
1
3
1+
1
1
1+
1
2
1
2
2
2
2+
2
-----O-O-HF-N N N N N N N N N
1+1 4+ +
1+
ANHNNNNNHHH Ĝ)
+++
Að Gð <il að 60 61 61 60 00 00 00 01 01NNIN—OOOTI HINN HAHN ON
4.
43东443
3
NO CIA IP 12 03 20 19 do do do do IP
3
3+
3
3+
3+
4+
+++++
+
3
2+
2+
3+
2+
+
च
1
:
31,
3
Mean....... 2.0
2.1
2.2
2.6
3.4
3.3
3.8
3.4
3.2
2.1
1.4
1.4
20. The tide tables for the port of Hongkong for 1894 are based on the analysis of the hourly readings of tides in 1887 and 1888. The harmonic analysis of the tides for 1889 has now been completed under the supervision of Professor G. H. DARWIN of Cambridge.
21. The number of transits observed in 1893 was 680, the inclination of the axis was determined 261 times, and the Pole Star was observed 39 times for the determination of the azimuth and collimation errors, as well as to ascertain the wire intervals, a new series of wires having being inserted in the diaphragm of the Transit Instrument on July 13. The following miscellaneous observations have been made:
Moon,.....
Sun, Jupiter,
.....29 observations.
9
"
4 .58
"}
Moon Culminating Stars,
the remainder (528) being for time determination. The azimuth of the meridian mark above Wanchai was determined three times. The rates of the Standard clocks are exhibited in the following tables. They are compared with the rates calculated from the formulæ exhibited at the head of the tables. Neither of the clocks has been cleaned during the year but it was found convenient to accelerate the rate of Dent on April 25 and of Brock on December 21. The existence of waves of rather long period as stated in the report of 1892 is again indicated, but an examination of the daily rates of the Brock clock shows that a variation having a period of seven days only also exists, the clock going faster after winding than before. The same period is indicated but in a less distinct manner in the length of the arc of vibration which increases with the accelerated rate.
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