259
log-books were received through the Harbour Master's Office, 31 direct from the Captains or Owners, and 2 were copied on board ship in the harbour. But the information concerning typhoons in 1888, 1889 and 1890 is by no means yet complete.
17. I regret to have to report that the magnetic hut was twice broken into and all the brass hooks and fastenings broken and stolen. Fortunately the magnetic instruments had been removed before this happened.
18. The following register of the spectroscopic rain-band has been supplied by an amateur, ing daily at 10 a., the mean value for the year was 2.4.
observ.
TABLE I.
Rain-band in Hongkong in 1890.
Date.
Jan.
Feb.
March. April. May.
June.
July.
Aug.
Sept. Oct. Nov. Dec.
1,
2
2,
1
3,
1
4,
5,
6,
7,
8,
9,
10,
},
1
12,
13,
14,
15,
16,
2
17,
18,
19,
20,
21,
22,
23,
24,
25,
26,
27,
28,
- - 10 00 00 10 10 10 10 PIN OC
29,
30,
0
31,
0
2
IA COIA HA 00 00 00 00 diPANNO-INNO 10, 20 19 04-NN-OOKON
KO NO 10 00 00 01 01 01 DI DI DI HA OLIN OF IN JA 10 10 00 00 00 jp 01 1h 01 OF 05 A H
444 00 IP 12 00 00 1 1O 1O 19 20 00
2
+4∞ NOON - ON O1 10 TH 20 HN N
∞∞☺☺☺-KK∞∞0 10 20 10 10 10 10 HA HA GO CO CV 1O IA 00 00
19 19 00 00 do do do
3
1122N
3
OD NO ON
:
3
2
2
3
4
2
3
2
:
:
Meau,...... 1.4
1.8
2.5
2.0
2.4
3.6
3.8
2.9
2.3
1.8
1.8
2.4
77
19. The following table exhibits corrections to be added to the mean readings of thermometers ex- posed in an open shed in order to obtain the readings of the rotating thermometers. The shed is covered with dried palm-leaves, which give the coolest shade obtainable. It is of the same dimensions as a shelter used for many years in India and very like the one represented in Blanford's "Indian Meteorologist's Vade-mecum,'
but there are additional pine stays. The screen is thus able to withstand the force of a whole gale without injury. The palm-leaves are raised during the gale but afterwards they settle down again in their places.-The thermometers are fixed in the same place as in the Indian shelter but are not further protected. Their upper ends are fixed into the extremities of two thin horizontal laths, projecting from the southern principal. The floor is turfed.-The table indicates that this expo- sure is better than any other hitherto described except during the hours of the forenoon after sun-rise, when the thermometers generally register too high. This is owing to the sun-shine heating the ground below them, whereas the rotating thermometers being swung both in the sun and in the shade register lower. In the afternoon that does not matter so much as the shades then have been previously exposed to the sun and are not so much cooler than the ground exposed to the sun :