Appendix F.
REPORT OF THE DIRECTOR OF THE ROYAL OBSERVATORY, HONGKONG, FOR THE YEAR 1915.
I-GROUNDS AND BUILDINGS.
The grounds were kept in order by the Botanical and Forestry Department with the assistance of the two Observatory coolies.
The growth of the blue grass (ophiopogon) planted in the spring of 1914, has been very slow. It has not spread sufficiently to prevent erosion.
The concrete on the paths in front of the main building was renewed in the month of February.
The other paths were considerably damaged by heavy rain in the summer months.
II. METEOROLOGICAL INSTRUMENTS.
Kew Barograph.-In the month of April the accumulator battery was made to operate the relay of the electric time-scaling apparatus, as it was found that the battery of dry cells formerly in use was unsuitable for the work,
Beckley Anemograph.--Since the introduction of the accumulator battery for operating the time-scaling apparatus in April, this instrument has worked continuously well. It is cleaned and oiled once a month.
Dines-Baxendell Anemograph.-This instrument has also worked well since the introduction of the accumulator battery for operating the time-scaling apparatus. The spindle of the float is cleaned once a week and the head oiled once a month.
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. 1910. 1911. 1912. 1913. 1914. 1915. January, 2.30 2.12 2.34 2.32 2.30 February, 2.35 2.25 2°27 March, 2'54 2'03 2°40 2'06 April, 2.33 2.33 2.26 2.25 2.05 May, 2.23 2.25 2'34 2'22 2.13 June, 2.23 2.10 2.44 2.09 2.13 July, 2.14 2'21 2'57 2.28 2.26 August, 2.07 2.25 2.65 2.39 2.18 September, 2.07 2.18 2.22 October, 2.31 2.30 2.27 2.51 2.69 November, 2.28 2.27 2.47 2.71 2.08 December, 2.23 2.31 2.24 2'54 2'07 Year, 2.25 2.29 2'41 2.39 2.22Factor (Dines/Beckley).
Appendix F.
REPORT OF THE DIRECTOR OF THE ROYAL OBSERVATORY, HONGKONG, FOR THE YEAR 1915.
I-GROUNDS AND BUILDINGS.
The grounds were kept in order by the Botanical and Forestry Department with the assistance of the two Observatory coolies.
The growth of the blue grass (ophiopogon) planted in the spring of 1914, has been very slow. It has not spread sufficiently to prevent erosion.
The concrete on the paths in front of the main building was renewed in the month of February.
The other paths were considerably damaged by heavy rain in the summer months.
II. METEOROLOGICAL INSTRUMENTS.
Kew Barograph.-In the month of April the accumulator battery was made to operate the relay of the electric time-scaling apparatus, as it was found that the battery of dry cells formerly in use was unsuitable for the work,
Beckley Anemograph.--Since the introduction of the accumulator battery for operating the time-scaling apparatus in April, this instrument has worked continuously well. It is cleaned and oiled once a month.
Dines-Baxendell Anemograph.-This instrument has also work- ed well since the introduction of the accumulator battery for operating the time-scaling apparatus. The spindle of the float is cleaned once a week and the head oiled once a month.
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:-
Factor (Dines Beckley
ley).
3
Month.
1910.
1911. 1912.
1913. 1914.
1915.
January, February,
March,
4
April,
2133 2:30 2*12 2.34 2.32 2.30 2°30 2.35 2.25 2°27
2'54 2'03
2°40 2'06
2.33
2'04
2133 2-26
2.25
2.05
May,
2:23
2.25
2'34
2'22
2.13
2*23
June,
2.23
ΖΙΟ 2:44
2:09
2.13
2.22
July,
2:14
2'21
2'57
2:28
2:26
2.05
August,
2:07
2.25 2.65
2.39
2.18
2'07
September,
2.18
October,
2.31 2.30 2.27 2.51 2.69
2'49
2.81
2'22
2.19
2.08
2.23
November,
2.28
2*27 2:47
2.71
2:08
2'08
December,
2.23
2.31
2.24
2'54
2'07
2:07
Year,
2.25
2:29
2'41
2.39
2*22
2'1 I
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