58
THE HONGKONG GOVERNMENT GAZETTE, 29TH JANUARY, 1898.
here free of cost. During the past year 7 barometers, 5 aneroids and 10 thermometers were verified. In addition, several hundred barometers and aneroids on board ship were compared with our standard.
12. The following table shows the spectroscopic rainband as observed daily at about 10 a. mean value for the year was 2.1.
The
Table II.
Rainband in 1897.
Date.
Jan.
Feb.
Mar. April.
May. June.
July,
Ang.
Sept.
Oct.
Nov.
Dec.
2,
8,
9,
10,
11,
12,
13,
14,
15,
16,
17,
18,
19,
20,
21,
22,
23,
24,
25,
26,
27,
2-22 NOI HON CO O O --N-N N N N 10 N N Y N NNN
1122 NNNNNNNNI CON NINHO
2
1
2
28,
29,
30, 31,
∞ N N N NNNNNN 10 DNNNNNNN 1 ∞ 1 LO NO NO NO - NO NOK NO
2
~~~~NNNNN——— 10 00 10 NINN∞9 00 10 10 14 00 00 10 — — 00
NNNNNN ∞ ∞ A di On 0: ou to do o0 10 10 10 10 10 A 00 00 10 10 00 NGNE
00 00 00 00 IA 00 1 1 1 00 00 00 00 00 19NN2N OP KO LO 00 00 10 10 00 10 NO
09 00 00 00 N N 0 NNNNN 10 10 10 10 NO NO NO NO NO NO 10 00 09 WNNN
- 09 09 to 10 10 00 00 00 01 Or
3
3
60 50 60 01NNNNNNNNNN DO N
NNNNNNNU NO NO NO 00 CO NO NO NO 09 10 10 CNN NNO NO NO NO NNN
10 10 10 29 1NNINNNNNNNN∞ NNNNNO 00 00 00 μì 20 10 10 10 NO
---------
OLDUSE DIN N N O O O O 30 N N N ---OO-TO-
2
3
Mean,.
1.7
1.9
2.1
1.9
2.6
2.8
2.3
2.7
2.1
2.2
1.5
:13
1.5
13. Mr. PLUMMER observed 402 transits for time determination in 1897, and the axis of the tran- sit instrument was levelled 171 times, i.., upon each day when observations were made. The rates of the standard clocks are given in the accompanying tables (III and IV), and are compared with the rates given by the formula at the head of the tables. No alteration has been made to either clock during the year, and although it was found necessary to clean the contact springs of the sidereal standard clock on November 29th, this was effected without in any way interfering with the going of the clock.
The errors of the Time Ball are given in table V. The time ball has twice been under repair, namely, from March 5 to 10, when the base of the piston was found to have been shattered, and a new brass base was fixed to it by the Hongkong and Whampoa Dock Company in place of the original cast iron one; and again from July 13 to 19, when the zine tube within the ball was found to be crumpled up and pressing against the mast. On July 7 the lock was under repair. There were five failures of the time ball in 1897, viz., on March 11 owing to an error of the workmen in centering the new brass base of the piston; on June 25, in consequence of the discharging spring being too weak; on July 6 because the tooth of the lock (being much worn) allowed the piston to jamb against the opposite side of the cylinder; on July 8, because the Assistant failed to raise the piston high enough to free the tooth of the lock; and on July 12, for the reason already given as rendering the repairs necessary on the days immediately following. The ball is not dropped on Government holidays and on one other occasion (Sunday, May 9) in consequence of the illness of two Assistants it was inter- mitted. It was successfully dropped 332 times in this year. The probable error was in January +0833, in February ±019, in March ±016, in April 012, in May +016, in June 13, in July +0:09, in August +013, in September ±010, in October +014, in November +16, in December +0*12.
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