72 



nnmbev is — 1 .9-1 less than the average, of tlic previous ten j-ears. On no one 

 iTiiy, except the 12th, was there rain enough precipitated, to cleanse the surface 

 drains, and sewage channels of the city. S/iow was persistent on Mount "Wel- 

 lington throughout the month, and received several additions. 



Humidity mean, 78, was — 4^ less than cho 20 j^ears' average, and 2 less 

 than July 1864. 



Elastic force of Vapor, had a mean of 251, being — 8 less than the 20 years* 

 average, and 31 below the mean of 1864. No doubt this compensated, to some 

 extent, for the low humidity mean. The maximum record was, 318 at noou on 

 the 17th, and the minimum, 174, was registered at 7 a.m., on the 10th. Last 

 year these extremes were, 403 and 193 respectively. 



. Spontaneous Evaporation amounted to 1.92 inches, therefore, but slightly 

 exceeding rain-fall. 



Cloud mean, 590, was all but identical with that of July, 1864, though + '63 

 above the twenty years' average. 



Ozone mean, 8,55, was higher than that for any July of the eight years' 

 records, and above the mean of the whole, by +1'65, and exceeding 1864, by 

 +1"24, The maximum was at the point of saturation — 10 — at eight of the 

 morning and evening observations. The amount registered never fell below 

 7. So much aerial purity, with so little electric-force of vapor, and warm sunny 

 days, was highly conducive to health. 



. Electricity liKii 21 positive indications, with maximum tension of 6; and 34 

 negative with maximum tension of 7. Nil was recorded at 7 observations, 

 being all the records on the 12th, 13th, 23rd, and evening of the 24th. In July 

 1864,there were only 6 j^ositives, with maximum tension of 5*5. Negatives 42 

 with maximum tension of 6, and 14 "nils." To a great extent this abundance 

 of electricity accounts for the high ozone mean. No lightning was observed 

 during the month. 



The 36 deaths in the present month contrast most favorably with tlie 70 in 

 July 1864, and indeed with any July of the previous eight yeai's ; for though 

 1862 too had only 36 deaths, yet comparing the "causes of death" and the 

 *' ages at death" of the two, 1865 had much the most favorable aspect. The 

 average of the eight years exceeds the present month's moi-tality by 4-ll"i. 



*'Under one year of age" the deaths were below the eight years' average, 

 and less than half the number in July 1864. At " 1 to 5" the mortality 

 was but little above one-fourth of the average, and only half of what occurred 

 m July 1864. At all ages under five years old— the usual standard for infautHe 

 mortahty — the deaths were only one-quarter of those at all ages ; very little 

 more than half the average of the eight years, and less than any year of the 

 eight, inclusive even of 1862, which had the same numerical total as the present 

 year. At " 5 to 20" the deaths were less than the average, and not half of 

 those at the corresponding ages in 1864, though fom- years out of the eight had 

 a still smaller number than the present month. At "20 to 45" no one year of 

 the eight had so few deaths, and 1864, as well as the eight years' average, had 

 above double the number. At "45 to 60" the deaths were considerably 



