F 6
VI. MAGNETIC OBSERVATIONS.
13. The following table gives the annual values of the magnetic elements in 1932.
Declination (West).
Dip (North).
0° 43′ 16′′
30° 33' 8"
0.37545.
Horizontal Force (C.G.S. Unit) ...
A detailed record of the results obtained at the Au Tau Magnetic Station during 1932 is now in the press.
VII. TIME SERVICE.
14. The timeball is dropped at 10h. a.m. on Sundays and public holidays, 10h. a.m. and 1h. p.m. on Saturdays, and 10h. a.m. and 4h. p.m. on other days. Time signals are given from 8h.55 to 9h. p.m. each night by means of lights which are extinguished every second, except for periods marking the minutes and half minutes,
15. The timeball was dropped successfully 659 times. There was one failure, on 22nd April at 10h. a.m., when it fell 35 seconds early owing to an electrical fault. The ball was not raised on 8th April at 10h. a.m., owing to faults on the external line, and on 17th September at 10h. a.m. and 4h. p.m. owing to a typhoon gale.
The error of the timeball due to accumulated clock error did not exceed 0s.3 throughout the year.
16. Observations of the radio time signals emitted by Nauen at 8h. a.m. have been made daily, whenever possible, during the year, and utilised for clock regulations.
17. Clocks. Cottingham and Mercer 507 (Sidereal) and Leroy 1,350 were in use throughout the year.
Observations with the transit instrument for 1931 and 1932 are given in the following table:-
1931 1932 Transits 861 1,007 Level determinations 442 512 16 42 Azimuth determinations (mark)... 164 216 Azimuth determinations (transit of circumpolar stars).. 34 38 Collimation determinations (mark)- F 6
VI. MAGNETIC OBSERVATIONS.
13. The following table gives the annual values of the magnetic elements in 1932.
Declination (West).
Dip (North)..
0° 43′ 16′′
30° 33' 8"
0.37545.
Horizontal Force (C.G.S. Unit) ...
A detailed record of the results obtained at the Au Tau Magnetic Station during 1932 is now in the press.
VII. TIME SERVICE.
14. The timeball is dropped at 10h. a.m. on Sundays and public holidays, 10h. a.m. and 1h. p.m. on Saturdays, and 10h. a.m. and 4h. p.m. on other days. Time signals are given from 8h.55 to 9h. p.m. each night by means of lights which are extinguished every second, except for periods marking the minutes and half minutes,
15. The timeball was dropped successfully 659 times. There was one failure, on 22nd April at 10h. a.m., when it fell 35 seconds early owing to an electrical fault. The ball was not raised on 8th April at 10h. a.m., owing to faults on the external line, and on 17th September at 10h. a.m. and 4h. p.m. owing to a typhoon gale.
The error of the timeball due to accumulated clock error did not exceed Os.3 throughout the year.
16. Observations of the radio time signals emitted by Nauen at 8h. a.m. have been made daily, whenever possible, during the year, and utilised for clock regulations.
17. Clocks. Cottingham and Mercer 507 (Sidereal) and Leroy 1,350 were in use throughout the year.
Observations with the transit instrument for 1931 and 1932 are given in the following table:-
Transits
Level determinations
1931 1932
861
1,007
442
512
16
164
216
42
Azimuth determinations (mark)... 34
Azimuth determinations (transit
of circumpolar stars).. Collimation determinations (mark) 38
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