82 



that of the present mouth. The greatest range on any day was 28 degrees, 

 tecorded on the 3rd, 8th, and 15th ; the lowest was 11 degrees on the 30th. 

 ITie Registrar-General of England in his adniirable quarterly reports often 

 refers to the "deadly effects of a rapid depression of temperature on persons 

 of low vital powers." In this climate, however, variations of pressure seem to 

 have a more lethal influence on such persons. 



Solar-intensity mean, 85 08 degrees, is + 3 '66 degrees above the August 

 mean of the previous nine years, and higher than any one of them except 18 

 56, which had a mean of 92 degrees. Last year's August, was nearly 6 degrees 

 below the mean of this year's. The maxinium record was 98 degrees on the 

 7th. In three years out of the nine, there were greater maxima than this, 1858 

 Was the same, and the other five had all much less. The minimum record was 

 58 degrees on the 26th. The corresponding records of 1864 were. 93 and 60. 



Terrestrial-radiation mean was, .':i5 85 degrees, which only differs from the 

 nine years' mean, by an excess of + '05, but is — 1'68 below the mean of 

 August 1864. The extremes were, 43 5 on the 13th and 27*5 on the 25th. 



The total Rain-fall, amounted to 1'23 inches, being — "83 of an inch below 

 the 20 years' mean, and nearly one and a half inches less than fell in August 

 last year The rain fell on 15 days in the month, being + r70 in number 

 above the ten years' average. Only on the 29th was there enough precipitated 

 to thoroughly cleanse the surface drains. 



Snoiv was never absent fr jra Mount Wellington during the month, and fre- 

 quent fresh deposits took place. 



Humidity mean, 76, was — 3| below the 20 years' average. 



Elastic-fot'ce of Vapor had a mean of, 265j which is — 12 less than the mean 

 of the 20 years. 



Spontaneous-evapo7'ation amounted to, 2 '51, inches. 



Cloud mean, 5 58, was so nearly that of the 20 years' that it only differed 

 by being — 'Oi less, though it was much below the average of 1864 and 1863. 



Ozone had a mean of, 7'75, being -f "26 more than the average of the previous 

 eight years, but was — '79 less than August 1864 had, and — "87 less than was 

 noted in August 1863. The maximum 10 (saturation) was recorded on the Ist 

 and 15th. The minimum 6 was registered on the 10th. 



Electricity was more abundant and stronger than was ever before recorded. 

 There were 38 positive indications to 24 negative, and the maximum tension of 

 each was 8, — no " nils'" were registered. In August last year the first had 

 only 13 records with maximum tension of 5 "5, and the second 37 with maximum 

 tension of 5 and 12 " nils." 



Lightning was observed on the evening of the 13th and 30th. Aurora 

 Australis on that of the 3rd. 

 _ The 42 deaths this month, were — 6| below the average of the previous 

 eight years, though both the Augusts of 1864 and 1863 had each one less ; never- 

 theless, when the " ages at death," and the " causes of death," are compared 

 for the same years,it will be found that the August of 1865 was by far the most 

 favorable to health and life. 



Under 1 year old" the deaths were less than half the eight years' mean, tad 



