F 17
So far as I am aware this is the first time that direct comparisons between two such mountings has been made, though it has generally been conceded that a solid pier in an underground room is necessary for the satisfactory registration of earth movements.
141 earthquakes were recorded during the year, as against 144 in 1922. The seismograms have been forwarded to the President of the Seismological Committee, Oxford.
Upper Air Research.-49 flights with pilot balloons were made during the year. The results of the observations have been sent to the Commission International pour l'exploration de la haute atmosphère, Kristiania.
Observations by the "tail" method have shown that the assumption of a constant rate of ascent is not justified. Observations with one theodolite therefore will not give results of the accuracy necessary in upper air research. An attempt is being made to secure observations with a second theodolite at a point about 3 miles to the NNW of the Observatory.
Staff.-No change occurred in the European staff. Mr. B. D. Evans, First Assistant, was on leave from February 21 to November 14.
Wan Suit Ngam, (IIIrd grade Telegraphist-computer) retired on January 31 and Lam Kai Tseung was promoted to IIIrd grade.
Lau Pak Wah and Chu Ip Sheung were promoted to Vth Grade on January 1, Chan Lai Man was appointed IVth Grade Telegraphist-Computer on 1922, December 7.
Expenditure.-The annual expenditure on the Observatory for the past ten years is as follows:-
Year Total Expenditure Increase Decrease $ $ $ 1914 25,398.31 1,142.82 1915 23,233.12 2,165.19 1916 21,977.78 1,255.34 1917 26,890.50 4,912.72 1918 20,028.24 6,862.26 1919 23,450.57 3,422.33 1920 25,965.66 2,515.09 1921 32,700.51 6,734.85 1922 38,350.10 5,649.59 1923 38,522.58 172.48F 17
So far as I am aware this is the first time that direct compari- sons between two such mountings has been made, though it has generally been conceded that a solid pier in an underground room is necessary for the satisfactory registration of earth movements.
141 earthquakes were recorded during the year, as against 144 in 1922. The seismograms have been forwarded to the President of the Seismological Committee, Oxford.
Upper Air Research.-49 flights with pilot balloons were made during the year. The results of the observations have been sent to the Commission International pour l'exploration de la haute atmosphere, Kristiania.
Observations by the "tail" method have shown that the assumption of a constant rate of ascent is not justified. Observa- tions with one theodolite therefore will not give results of the accuracy necessary in upper air research. An attempt is being made to secure observations with a second theodolite at a point about 3 miles to the NNW of the Observatory.
Staff.-No change occurred in the European staff. Mr. B. D. Evans, First Assistant, was on leave from February 21 to November 14.
Wan Suit Ngam, (IIIrd grade Telegraphist-computer) retired on January 31 and Lam Kai Tseung was promoted to IIIrd grade.
Lau Pak Wah and Chu Ip Sheung were promoted to Vth Grade on January 1, Chan Lai Man was appointed IVth Grade Telegraphist-Computer on 1922, December 7.
Expenditure.-The annual expenditure on the Observatory for the past ten years is as follows:-
Year.
Total
Expenditure.
$
Increase.
Decrease.
0.
$
C.
$
..
1914
25,398.31
1,142.82
1915
23,233.12
1916
21,977.78
2,165.19 1,255.34
1917
26,890.50
4,192.72
O
1918
20,028.24
6,862.26
1919
23,450.57
3.422.33
→
1920
25,965.66
2,515.09
1921
32,700.51
6,734-85
1922
38,350.10
5.649-59
1923
38,522.58
172.48
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