99 



little more than four degrees less than the dry-hulb mean, being 61-08 



degrees. 



Daily-range of temperature meayi^ 20-55 degrees, is 4-1*53 above the 20 

 years' average, and +1-23 more than 1865 had. The extremes were, 

 maximum 39, on the 31st; minimum 6, on the 24th, No October in the 

 previous 25 years had so high a maximum. Last year was 38, and 

 singularly enough occurred also on the 31st day of the month. In 1862, 

 also, a maximum of 38 degrees weis recorded. The first twelve days 

 of the month had a mean of nearly four degrees less in daily-range than 

 that of the whole month ; on these twelve days only 8 deaths occurred, 

 while on the remaining 19 days there were 27. 



Solar -intensity had the mean of 98-30 degrees, being +2-70 degrees 

 more than the average of the previous 10 years, and + ri2 higher than 

 1865 had. As cloud mean was above the 20 years' average, it is evident 

 that the sun's rays must have been unusually intense while they were un- 

 •obstructed. The maximum, 122-5 degrees, was noted on the 30th, and 

 was higher than ever occurred before in any of the Octobers recorded. 

 The minimum was 54 degreea on the 24th, which was a cold wet day, with 

 •a fresh south wind. 



Terrestrial-radiation had a mean of 42-32 degrees, which is only + -33 

 of a degree above the mean of the previous 10 years, but —-84 of a 

 degree less than 1865 had. The extremes were, maximum 50, on the 

 5th, 6th, and 18th ; minimum 30-5, on the Ist. 



Rainfall amounted to 3-34 inches, being + 1-37 more than the 20 years' 

 average for October. Only 1861, in the previous 25 years, had a greater 

 rainfall, i.e.: — 5-04 inches. There were twelve wet days, being — 2-90 less 

 than the average of the previous 11 years. The greater part of the 

 deposit fell on the 23rd, 24th, 25th, — i.e., 1'75, '68, -15, respectively. This 

 gave a thorough cleansing to the sewers and city rivulet, and approached 

 very nearly to a flood. Snow was never absent from Mount Wellington 

 during the month. On the 11th it was coated afresh to its base, and 

 showers of mixed snow, hail, and rain fell even in the city, but did not 

 whiten the ground. 



Humidity mean, 75, was + 2 more than the 20 years' average. 



Spontaneous-evaporation consideTsihly exceeded rainfall, being 5-09 inches. 



Elastic force of vapor mean, 334, was + 33 above the 20 years' average. 

 Out of the previous 25 years, only 1858 had a higher mean, i.e., 341. The 

 range was, from minimum 154 on the 12th, to maximum 494 on the 31st. 

 Though the mean of 1865 was 29 less than the present month, the ex- 

 tremes were both higher and lower, i.e., 517 and 118. 



Cloud mean, 5-88, was + -26 above the 20 years' average, though —-87 

 less than in 1865. 



Ozone TdQaxi, 8-10, was + -18 above the 9 years' average, though —-78 

 less than October 1865 had. Consequently the present month, while even 

 more free from zymotic diseases than that month was, had also a smaller 

 amount of those acute inflammatory diseases of the respiratory organs 

 than was then recorded. Saturation, 10, was registered four times, and 

 the minimum was 6. Last year saturation occurred nine times, and the 

 minimum was 7. 



Electricity had 30 positive indications, with tension ranging from maxi- 

 mimi 8-5 to minimum 25. In 1865 there were only 24 positive, with 

 tensions ranging from 8 to 2-5. There were 27 negative, with tensions 

 ranging from 8 to 1-5. Last year they were 36, with range of tension from 

 7 to 1-5. There were 5 ''Nils'' this 'month, while 1865 had only 2. No 

 lightning was observed, but thm^der was heard on the 3rd of the month. 



