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Table VIII. exhibits the number of hours during a portion of which at least 0.005 inch of rain was registered.
Table IX. exhibits the number of days with wind from eight different points of the compass. The figures are obtained from the mean daily directions in Table VII. of the monthly reports. Days with wind from a point equidistant from two directions given are counted half to one of these and half to the other
e.g.,
half of the days when the wind was NNE are counted as N and the other half as NE. Table X. exhibits the number of days on which certain meteorological phenomena were registered, and also the total number of thunderstorms noted in the neighbourhood during the past year.
Table XI. shows the frequency of clouds of the different classes.
Table XII. is arranged as in previous years.
Tables XIII. and XIV. exhibit the monthly and annual extremes. The extremes of humidity and vapour tension can be regarded as only approximate as the hourly values are not calculated.
Table XV. contains five-day means.
Tables XVI., XVII. and XVIII. contain magnetic observations.
22. The following phenomena were noted during the different months of 1891 :—
PHENOMENA OBSERVED IN 1891.
January, 1891.
Lunar Corona: on the 18th, 19th, 20th, 22nd, 25th and 26th.
Haze on the 3rd, 7th, 13th and 31st.
February, 1891.
Lunar Corona: on the 13th, 16th, 21st, 23rd, 25th and 26th.
Fog: on the 3rd, 5th, 24th, 26th and 27th.
Haze on the 6th, 7th, 23rd, 27th and 28th.
Unusual Visibility: on the 1st and 20th.
Dew on the 22nd and 23rd.
Thunder without lightning on the 2nd.
March, 1891.
Solar Corona: on the 22nd,
Lunar Corona: on the 16th, 17th and 24th.
Fog on the 3rd, 20th, 21st and 31st.
Haze on the 1st, 8th, 25th, 26th, 27th and 28th.
Unusual Visibility: on the 12th and 16th.
Dew on the 1st, 15th and 26th.
:
Lightning without thunder: on the 10th.
Thunderstorm on the 16th in the forenoon (nearest at 11.13a, in WNW-4 8.)
April, 1891.
Solar Halo: on the 24th.
Lunar Corona: on the 14th, 20th, 21st, 22nd, 23rd and 26th,
Fog: on the 15th, 16th and 24th.
Haze on the 8th, 9th, 10th, 23rd, 26th and 27th.
:
Unusual Visibility: on the 5th, 6th, 18th and 26th.
Dew on the 23rd, 24th, 26th and 27th.
Lightning without thunder: on the 26th.
Thunder without lightning: on the 18th.
Thunder and Lightning: on the 3rd.
Thunderstorm: on the 4th, 12.10a.-10.30a., SE-NW nearest 12.15a. (5 s. SE.)
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