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or forwarded by the captains. The total number of vessels whose log books have been made use of was 194. The total number of days' observations (counting separately those made on board different ships on the same day) was 14,726. Acknowledgment is here made of the courtesy of those masters of vessels who have been good enough to forward their observations.
13. The entry of observations made at sea in degree squares for the area 9° South and 45° North Latitude, and between the longitude of Singapore and 180° East of Greenwich has been continued by Mr. Jeffries and, after her return from leave of absence on November 3rd, by Miss Doberck, and 347,190 in all have now been entered.
The means of these observations have been taken for the degree squares comprised in the following areas:-Equator to 6° South Latitude and from the Longitude of Singapore to 125° East for the months of January to December inclusive; Equator to 25° North Latitude and from 100° to 125° East Longitude for the month of January.
14. The tracks of the typhoons of 1909 have been laid down by Mr. Plummer, and they will be printed and distributed as soon as possible.
15. During the past year several hundred indirect comparisons of barometers and aneroids on board ship have been made. A few barometers and aneroids have been compared for various people in the Observatory.
16. The rainfall in inches recorded by the gauge placed in the Police compound at Taipo, New Territories, was as follows:- January 1.21, February 2.08, March 2.87, April 2.30, May 8.15, June 10.45, July 19.42, August 9.28, September 7.07, October 25.58, November 0.07, December 0.00, the total for the year 1909 being 88.48 inches. On an average of the four years during which this gauge has been in operation the rainfall measured at Taipo has exceeded that recorded at the Observatory by 20 per cent.
17. The Dines-Baxendell pressure-tube Anemograph ordered from London in the spring had not been received at the close of the year. It has since arrived and is now being mounted, and it is expected that it will be brought into use shortly.
A chronograph of inexpensive form ordered at the same time, was received in December, and has since, by means of an electrical device, been made available for obtaining a record of the revolutions of the cups of the Beckley Anemograph during short intervals of time, whenever required.
The registering parts of these instruments are placed on the ground floor where the record can be inspected at all times, which is a great advantage.
18. In 1909 the number of transits observed was 431. The axis of the transit instrument was levelled 262 times, and the collimation and azimuth errors were determined 18 times by aid of the meridian mark. The whole of these observations have been made by Mr. Plummer. Both the standard clocks have been cleaned during the
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or forwarded by the captains. The total number of vessels whose log books have been made use of was 194. The total number of days' observations (counting separately those made on board different ships on the same day) was 14,726. Acknowledgment is here måde of the courtesy of those masters of vessels who have been good enough to forward their observations.
13. The entry of observations made at sea in degree squares for the area 9° South and 45° North Latitude, and between the longitude of Singapore and 180° East of Greenwich has been continued by Mr. Jeffries and, after her return from leave of absence on November 3rd, by Miss Doberck, and 347,190 in all have now been entered.
The means of these observations have been taken for the degree squares comprised in the following areas :-Equator to C° South Latitude and from the Longitude of Singapore to 125° East for the months of January to December inclusive; Equator to 25° North Latitude and from 100° to 125° East Longitude for the month of January.
14. The tracks of the typhoons of 1909 have been laid down by Mr. Plummer, and they will be printed and distributed as soon as possible.
15. During the past year several hundred indirect comparisons of barometers and aneroids on board ship have been made. A few barometers and aneroids have been compared for various people in the Observatory.
16. The rainfall in inches recorded by the gauge placed in the Police compound at Taipo, New Territories, was as follows:- January 1.21, February 2.08, March 2.87, April 2.30, May 8.15, June 10.45, July 19.42, August 9.28, September 7.07, October 25.58, November 0.07, December 0.00, the total for the year 1909 being 88.48 inches. On an average of the four years during which this gauge has been in operation the rainfall measured at Taipo has exceeded that recorded at the Observatory by 20 per cent.
17. The Dines-Baxendell pressure-tube Anemograph ordered from London in the spring had not been received at the close of the year. It has since arrived and is now being mounted, and it is expected that it will be brought into use shortly.
A chronograph of inexpensive form ordered at the same time, was received in December, and has since, by means of an electrical device, been made available for obtaining a record of the revolutions of the cups of the Beckley Anemograph during short intervals of time, whenever required.
The registering parts of these instruments are placed on the ground floor where the record can be inspected at all times, which is a great advantage.
18. In 1909 the number of transits observed was 431. The axis of the transit instrument was levelled 262 times, and the collimation and azimuth errors were determined 18 times by aid of the meridian mark. The whole of these observations have been made by Mr. Plummer. Both the standard clocks have been cleaned during the
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