F 14
a light spiral spring on the horizontal arm of the dash pot. 5 seconds is found sufficient. A slot is cut in the shutter so as to make only a partial eclipse, thus avoiding loss of register while making a sufficient break to mark the minutes. This idea is due to Mr. J. J. Shaw. The minutes are identified by leading the circuit through contact springs on the face of the barograph clock, the minute hand of which breaks the contact at the 60th minute, as explained on page 1.
The instrument is provided with a fixed mirror for producing a base line; a necessary adjunct for investigating diurnal and secular changes of level.
With its present mounting diurnal tilting of the instrument is very marked, following more closely the external than the internal temperature. This indicates that the movement is due to tilting of the stone pillar on which the instrument is mounted rather than to a temperature effect on the instrument.
37 earthquakes were recorded from September 26 to December 31. Of these 5 were felt as slight shocks locally and 5 others were apparently of local origin, though unfelt.
Meteorological Observations at Victoria Peak.-Meteorological observations at Victoria Peak were commenced in June by Mr. C. H. Cotton, who succeeded Mr. MacGrann as Officer in Charge of the Peak Signal Station.
Mr. Cotton seems to have had considerable difficulty in keeping the Anemograph and thermograph in order. The hourly time signals from the Observatory have failed repeatedly and much register has been lost.
Observations made with rotating thermometers at 8h., 10h., noon 14h., and 16h. daily, indicate that in June the temperature of the air at Victoria Peak during the day was 8° F. lower than at the Observatory, Kowloon, and 3° lower in December. The temperature of evaporation was 4° lower in June and 5° higher in November. The relative humidity was 16% higher in June and 42% higher in November.
Atmospherics. The intensity of atmospherics was recorded by the operators at Stonecutters Naval Radio-Station 13 times daily, throughout the year, on a scale of 0 to 4, and curves have been prepared showing the annual inequality and the mean diurnal inequality in each month.
The maximum intensity, 2.92, occurred in May, with a secondary maximum, 2.35, at the end of August, and the minimum, 1.50, in December.
As regards diurnal inequality the maximum intensities occurred at midnight in the spring and autumn, at 3 a.m. in the summer, and at 2 a.m. in the winter. The minimum intensity occurred at 10 a.m. in the spring and winter and at 9 a.m. in the summer and autumn.
F 14
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a light spiral spring on the horizontal arm of the dash pot. 5 seconds is found sufficient. A slot is cut in the shutter so as to make only a partial eclipse, thus avoiding loss of register while making a sufficient break to mark the minutes. This idea is due to Mr. J. J. Shaw. The minutes are identified by leading the circuit through contact springs on the face of the barograph clock, the minute hand of which breaks the contact at the 60th minute, as explained on page 1.
The instrument is provided with a fixed mirror for producing a base line; a necessary adjunct for investigating diurnal and secular changes of level.
With its present mounting diurnal tilting of the instrument is very marked, following more closely the external than the internal temperature. This indicates that the movement is due to tilting of the stone pillar on which the instrument is mounted rather than to a temperature effect on the instrument.
37 earthquakes were recorded from September 26 to Decem- ber 31. Of these 5 were felt as slight shocks locally and 5 others were apparently of local origin, though unfelt.
Meteorological Observations at Victoria Peak.-Meteorological observations at Victoria Peak were commenced in June by Mr. C. H. Cotton, who succeeded Mr. MacGrann as Officer in Charge of the Peak Signal Station.
Mr. Cotton seems to have had considerable difficulty in keep- ing the Anemograph and thermograph in order. The hourly time signals from the Observatory have failed repeatedly and much register has been lost.
Observations made with rotating thermometers at sh., 10h., noon 14h., and 16h. daily, indicate that in June the temperature of the air at Victoria Peak during the day was 8° F. lower than at the Observatory, Kowloon, and 3° lower in December. The temperature of evaporation was 4° lower in June and 5° higher in November. The relative humidity was 16% higher in June and 42% higher in November.
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Atmospherics. The intensity of atmospherics was recorded by the operators at Stonecutters Naval Radio-Station 13 times daily, throughout the year, on a scale of 0 to 4, and curves have been prepared showing the annual inequality and the mean diurnal inequality in each month.
The maximum intensity, 2.92, occurred in May, with a secondary maximum, 2:35, at the end of August, and the minimum, 150, in December.
As regards diurnal inequality the maximum intensities occurred at midnight in the spring and autumn, at 3 a.m. in the summer, and at 2 a.. in the winter. The minimum intensity occurred at 10 a.m. in the spring and winter and at 9 a.m. in the summer and autumn.
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