F 18
61. Time signals are also given at night by means of three white lamps mounted vertically on the Observatory radio mast. The lights are extinguished momentarily every second from 20h. 55m. to 21h. except at the 28th, 29th, 54th, 56th, 57th, 58th and 59th seconds, of each minute. The 21h. signals were repeated at midnight on December 31, the last signal indicating the close of the year 1931. The hours refer to Hong Kong Standard Time (8 hours east of Greenwich).
62. The time ball was dropped successfully 660 times. On August 1st at 10h. and 13h. and on September 2nd at 16h. the time ball was not raised owing to typhoon gales. The ball was not raised on December 11th at 16h. owing to an electrical fault.
63. The error of the time ball was 0s.5 on one occasion, 0s.4 on eleven occasions; on all other occasions the ball fell with an error of 0s.3 or less.
64. The probable error of the time ball in each month of the past five years is given in the following table.
Month 1927 1928 1929 1930 1931 January +0.14 +0.13 +0.10 +0.10 ±0.10 February .12 .10 .10 .13 .12 March .11 .10 .10 .12 .20 April .10 .10 .10 .16 .16 May .14 .10 .10 .15 .12 June .13 .20 .10 .14 .14 July .10 .11 .10 .10 .10 August .12 .20 .12 .12 .14 September .10 .11 .10 .10 .10 October .11 .11 .10 .11 .10 November .10 .10 .11 .10 .10 December .13 .12 .14 .10 .10 Means +0.12 +0.12 +0.11 .12 ±0.12...
was not needed as there was no missing word to indicate, and the text was reformatted according to the rules provided, using HTML as requested. The table was reconstructed, and minor corrections were made to adhere to the original text's content and order.F 18
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61.Time signals are also given at night by means of three white lamps mounted vertically on the Observatory radio mast. The lights are extinguished momentarily every second from 20h. 55m, to 21h. except at the 28th, 29th, 54th, 56, 57th, 58th and 59th seconds, of each minute. The 21h. signals were repeated at midnight on December 31, the last signal indicating the close of the year 1931. The hours refer to Hong Kong Standard Time (8 hours east of Greenwich).
62. The time ball was dropped successfully 660 times. On August 1st at 10h. and 13h. and on September 2nd at 16h. the time ball was not raised owing to typhoon gales. The ball was not raised on December 11th at 16h. owing to an electrical fault.
63. The error of the time ball was Os.5 on one occasion, Os.4 on eleven occasions; on all other occasions the ball fell with an error of Os.3 or less.
64. The probable error of the time ball in each month of the past five years is given in the following table.
Probable Error of the Time Ball,
Month.
1927
1928
1929
1930
1931
January,
+0.14
+0.13
+0·10
+0.10
±0.10
February,
.12
-10
·10
•13
12
March,
.11
•10
∙10
•12
•20
April,
-10
•10
•10
•16
.16
May,
.14
∙10
∙10
•15
•12
June,
13
'20
•10
14
14
July,
•10
11
10
-10
·10
August,
12
•20
•12
-12
·14
September,
-10
-11
·10
·10
∙10
October,
11
11
∙10
.] 1
•10
November,.
•10
10
11
.10
·10
.་་་་
December,...
•13
12
14
.10
•10
Means......
+0.12 +0.12 +0-11
012
±0.12
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