F 3
J
The action of the float having become unusually sluggish at low wind velocities, on April 12 a buzzer was fitted so as to vibrate the spindle of the float every minute. This however had no appreciable effect. The instrument was therefore again dismantled on May 19. It was found that the liquid paraffin had mixed with the water and so caused the float to stick. The mixture was poured away and replaced by fresh distilled water, on which was poured sufficient kerosene to make a very thin surface film. The performance of the instrument has since been more satisfactory. The action of the buzzer is now to bring the float gradually to its correct position when, in nearly calm weather, it tends to stick. This may take several hours to achieve.
23.
The instrument was calibrated on February 15 and August
The mean monthly results of comparisons with the records of the Beckley Anemograph from 1910-1926 are given in the following table, together with the results for 1927:
Month Mean 1910-1926 1927 January 1.94 February 1.97 March 2.02 1.88 April 2.04 2.22 May 2.17 2.83 June 2.20 2.75 July 2.23 2.60 August 2.20 2.79 September 2.22 2.14 October 2.12 2.17 November 2.00 2.2 December 1.92 2.14 Year 2.08 2.42Factor for converting the actual run of the Beckley Anemograph cups to velocities recorded by the Dines Pressure Tube Anemograph.
Thermometers.--All thermometers in use are compared with Kew Standard No. 647 in winter and summer.
F 3
J
The action of the float having become unusually sluggish at low wind velocities, on April 12 a buzzer was fitted so as to vibrate the spindle of the float every minute. This however had no appreciable effect. The instrument was therefore again dismantled on May 19. It was found that the liquid paraffin had mixed with the water and so caused the float to stick. The mixture was poured away and replaced by fresh distilled water, on which was poured sufficient kerosene to make a very thin surface film. The performance of the instrument has since been more satisfactory. The action of the buzzer is now to bring the float gradually to its correct position when, in nearly calm weather, it tends to stick. This may take several hours to achieve.
23.
The instrument was calibrated on February 15 and August
The mean monthly results of comparisons with the records of the Beckley Anemograph from 1910-1926 are given in the following table, together with the results for 1927:-
Factor for converting the actual run of the Beckley Anemograph
cups to velocities recorded by the Dines Pressure
Tube Anemograph.
Factor (Dines Beckley
÷
·).
3
Month.
Mean 1910-1926.
1927.
January,
1'94
February,
1'97
March,
2°02
April,....
2'04
1.88
2*22
2:56 2.68
May,
2.17
2.83
June,
2.[0
2775
July,
2.23
2.60
August,.
2'20
2'79
September,
2'22
2'14
October,.
2'12
2.17
November,
2'00
2.2
December,
1.92
214
Year..
2:08
2:42
Thermometers.--All thermoineters in use are compared with Kew Standard No. 647 in winter and summer.
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