Appendix F.
REPORT OF THE DIRECTOR OF THE ROYAL OBSERVATORY, HONGKONG, FOR THE YEAR 1917.
I.-GROUNDS AND BUILDINGS.
The grounds were kept in order by the Botanical Department with the assistance of the Observatory coolies.
II. METEOROLOGICAL INSTRUMENTS.
Kew Barograph. With the new glass rod for the temperature compensation it was found that the instrument was under-corrected for temperature. The compensation was adjusted on 1918, January 16.
Beckley Anemograph. This instrument was oiled once a month, and the orientation of the head checked occasionally.
Dines Anemograph.-The head was oiled once a month, and the spindle of the float cleaned and oiled once a week. The orientation of the head was checked monthly. On July 31 one-inch suction and pressure tubes were substituted for the original half-inch tubes, in order to obtain a more reliable record of gusts. The small bore cocks have not yet been changed.
The monthly results of comparisons with the records of the Beckley Anemograph since the installation of the Dines instrument, in April 1910, are given below:-
Month Factor (Dines ÷ Beck) 1910 1911 1912 1913 1914 1915 1916 1917 January 2.33 2.30 2'12 February 2.23 2.25 March 2.23 2.10 April 2.14 2.21 2'57 2*28 2.26 May 2'07 June 2*18 2.54 2'03 2:08 2'04 2'34 2.32 July 2.30 2.40 2:06 2.23 2'04 2.30 2.35 2.25 August 2.33 2'04 2:26 2.02 2.27 2.33 2:26 2.25 September 2.05 2.34 2°22 2.13 2.23 October 2:36 1.97 2.44 2'09 2.13 2.22 2:26 1.93 November 2'05 2.80 2'02 2.25 2.65 2.39 2.18 2:07 December 2.88 1.93 2.31 2'49 2.81 2*22 Year 2'21 2:29 2.42 2'39 2.19 2'21 2'07 2.23 2'10 2'00 2.08 2'04 1.67 2'07 2'10 1.68 2'22 2.II 2.30 1.95Appendix F.
REPORT OF THE DIRECTOR OF THE ROYAL
OBSERVATORY, HONGKONG, FOR THE YEAR 1917.
I.-GROUNDS AND BUILDINGS.
The grounds were kept in order by the Botanical Department with the assistance of the Observatory coolies.
II. METEOROLOGICAL INSTRUMENTS.
Kew Barograph. With the new glass rod for the temperature compensation it was found that the instrument was under-corrected for temperature. The compensation was adjusted on 1918, January 16.
Beckley Anemograph. This instrument was oiled once a month, and the orientation of the head checked occasionally.
Dines Anemograph.-The head was oiled once a month, and the spindle of the float cleaned and oiled once a week. The orientation of the head was checked monthly. On July 31 one-inch suction and pressure tubes were substituted for the original half-inch tubes, in order to obtain a more reliable record of gusts. The small bore cocks have not yet been changed.
•
The monthly results of comparisons with the records of the Beckley Anemograph since the installation of the Dines instru- ment, in April 1910, are given below:-
Month.
Factor (Dines Beck).
÷ 3
1910. 1911. 1912. 1913. 1914. 1915. 1916. 1917.
2.33 2.30 2'12
January, February,
·
March,
April,
May,
2'23
2.25
June,
2.23
210
July,
2.14
2.21 2'57 2*28 2.26
August,
2'07
September, 2*18
2.54 2'03 2:08 2'04 2'34 2732 2.30 2.40 2:06 2.23 2'04 2.30 2.35 2.25 2.33 2'04 2:26 2.02 2.27 2.33 2:26 2.25 2.05
2.33 2:05 2.34 2°22 2013
2.23
2:36 197 2.44 2'09 2013 2.22 2:26 193 2'05 2.80 2'02 2.25 2.65 2.39 2.18 2:07 2.88 193 2.31 2'49 2.81 2*22 October, 2°30 2°27 2'51 2·69 2:08 November, 2-28 2.27 2:47 2.71 2:08 December, 2.23 2.31 2.24 2.54 2'07
Year,...... 2'21 2:29 2.42 2'39
2.19 2'21 2'07
2.23 2'10 2'00
2.08 2'04 1.67 2'07 2'10 1.68
2'22
2.II
2.30 195
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