F 13
The Dent Mean Time clock (No. 39740) was used throughout the year for dropping the Time Ball, maintaining the electric time service in the Observatory, and sending hourly signals to the Railway, the Post Office, the Telephone Co., and the Eastern Extension Telegraph Co. The clock is corrected daily before 10 a.m. and before 4 p.m. by the electric regulating apparatus. Its daily rate is kept below 0.5 sec. by the addition or removal of weights from the pendulum.
Chronometer Dent No. 40917 is on loan to the Cape d'Aguilar Radio Station, Dent No. 39946 was returned from the Peak Signal Station on December 9.
Batteries, Power Supply, &c.—The necessary current for the Time Service has been supplied by accumulator batteries, charged as found necessary from the alternating mains of the China Light & Power Co., Ltd. by a rotary converter.
IX.—MISCELLANEOUS.
Seismograph.—The east-west component of the Milne-Shaw seismograph has worked satisfactorily during the year, though there occur occasional dislocations of the register for which no reason can be assigned; also tremor storms and irregular movements, both large and small. The pendulum for recording N. S. movements was received in December.
Experiments made on April 20, 21, and 27 indicated that the temperature co-efficient of the seismograph, as regards tilt, is negligible.
144 earthquakes were recorded during the year. The seismograms have been forwarded to the President of the Seismological Committee, Oxford.
An underground room is being built for the reception of both pendulums and the standard clock.
Meteorological Observations at Victoria Peak.—These were so unsatisfactory that they were discontinued in December by order of His Excellency the Governor.
Atmospherics. The intensity of atmospherics was recorded by the operators at Stonecutters Radio Station, on a scale of 0 to 4, 13 times daily, 8 times on a long wave and 5 times on a short wave.
From March 12 to the end of the year the intensity and character of atmospherics were also observed by the operators at Cape d'Aguilar Radio Station hourly, on a scale of 0 to 6, the wave length being 600 metres. The maximum hourly intensity occurred at about midnight in the summer and winter, and at...
!
F 13
The Dent Mean Time clock (No. 39740) was used through- out the year for dropping the Time Ball, maintaining the electric time service in the Observatory, and sending hourly signals to the Railway, the Post Office, the Telephone Co., and the Eastern Extension Telegraph Co. The clock is corrected daily before 10 a.m. and before 4 p.m. by the electric regulating apparatus. Its daily rate is kept below 05 sec. by the addition or reinoval of weights from the pendulum.
Chronometer Dent No. 40917 is on loan to the Cape d'Aguilar Radio Station, Dent No. 39946 was returned from the Peak Signal Station on December 9.
Batteries, Power Supply, &c.-The necessary current for the Time Service has been supplied by accumulator batteries, charged as found necessary from the alternating mains of the China Light & Power Co., Ltd. by a rotary converter.
IX.-MISCELLANEOUS.
Seismograph.—The east-west component of the Milne-Shaw seismograph has worked satisfactorily during the year, though there occur occasional dislocations of the register for which no reason can be assigned; also tremor storms and irregular move- ments, both large and small. The pendulum for recording N. S. movements was received in December.
Experiments made on April 20, 21, and 27 indicated that the temperature co-efficient of the seismograph, as regards tilt, is negligible.
144 earthquakes were recorded during the year. The seismograms have been forwarded to the President of the Seismo- logical Committee, Oxford.
An underground room is being built for the reception of both pendulums and the standard clock.
Meteorological Observations at Victoria Peak.-These were so unsatisfactory that they were discontinued in December by order of His Excellency the Governor.
Atmospherics. The intensity of atmospherics was recorded by the operators at Stonecutters Radio Station, on a scale of 0) to 4, 13 times daily, 8 times on a long wave and 5 times on a short
wave.
From March 12 to the end of the year the intensity and character of atmospherics were also observed by the operators at Cape d'Aguilar Radio Station hourly, on a scale of 0 to 6, the wave length being 600 metres. The maximum hourly intensity occurred at abont mid-night in the summer and winter, and at
No comments yet.
Private notes are available after approval.