Page:A Voyage of Discovery and Research in the Southern and Antarctic Regions Vol 2.djvu/102

84 The mean temperature of the surface of the sea is 58º.1.

The third table is also derived from all the observations made between the 19th of October and 17th November, an interval of thirty days; the mean temperature corresponding to the 3rd November has advanced two-and-a-half degrees, to 60º.5, and its range is from 74º to 47º. In England the mean temperature for May is 54º, and its range from 70º to 33º.

The mean temperature of the dew point is only 52º, showing that the atmosphere has attained a greater degree of dryness, being 8º.5; the moisture of the air is therefore reduced to 0.735. In England, we also find, that in May, the temperature of the air still outstrips the advance of vapour, and the atmosphere attains very nearly its state of greatest dryness; the mean temperature of the dew point being 46º.1; the degree of dryness is 7º.9, and the state of saturation, .769. The elasticity of vapour in New Zealand is 0.428; in England, 0.354 inch.

The quantity of rain in New Zealand, 9.5 inches, and the greatest fall occurred on the 8th November, between 4 and 6  2.1 inches, the barometer being about its mean height, and the wind from the north. In England the quantity of rain in May is only 1.85 inch.

The mean height of the barometer is 29.904, and its range 1.80 inch. In the diurnal tides the times of greatest pressure are 9 and 11 ,