Oliver. — Vegetation and Flora of Lord Howe Island. 



97 



here corrected and tabulated. I chose a period of one year, beginning in 

 the winter (1st July), as it shows a complete growing season, and may 

 thus be compared with a calendar-year period in the Northern Hemisphere. 



Table 1 shows the weather month by month. Table 2 shows the 

 length and character of each kind of weather, classed by wind-direction, 

 and brings out some interesting points, the chief of which are noted below. 



Atmospheric pressure varies regularly with the direction of the wind, 

 being highest in south-east and east weather, and lowest in north-west 

 and west weather. The highest reading recorded was 7744 mm., on the 

 9th June, 1912 ; wind east : the lowest, 750-3 mm., on the 16th September, 

 1911 ; wind north-west. 



Temperature, judged by both season and direction of wind, varies in 

 a regular manner. The maximum temperature recorded was 30° C, on the 

 8th February, 1912 ; the minimum, 64° C, on the 30th August, 1911. 



Rainfall is distributed fairly evenly throughout the year, though the 

 average for the winter montlis is higher than that of the summer months. 

 The average annual rainfall for twelve years is 1,818 mm., on 196 days. 

 During the period selected for analysis, out of a total of 1,265 mm., 779 mm., 

 or over 60 per cent., fell during northerly weather. This result, as well as 

 others noted in this section, agrees closely with that recorded for Sunday 

 Island (Oliver, Trans. N.Z. Inst., vol. 42, 1910, p. 125). The two islands are 

 situated in nearly the same latitude, and their climates are similar in most 

 respects. In the Kermadecs, however, the rainfall and relative humidity 

 are apparently higher than they are at Lord Howe Island, which differences 

 may result from the greater distance of the Kermadecs from the Aus- 

 tralian Continent. 



Relative humidity varies in accordance with the direction of the wind. 

 Northerly winds bring the most humid conditions, southerly winds the 

 least. On only three days the air was recorded as saturated, while on 

 twenty-one more the degree of relative humidity was above 90 : the lowest 

 record was 49 per cent., on the 31st January. 1912 ; direction of wind 

 south-east. 



4 — Trans. 



