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ANALYSIS OF THE OBSERVATORY RECORDS FOR NOVEMBER, 

 1865, IN CONJUNCTION WITH THOSE OF BIRTHS, DEATHS, 

 &c. By E. Swabreck Hall. 



To the mass of the commnnity, particularly all those unrler 45 years old, 

 never was there any month of the twelve, in the previous eight years and ten 

 months, so auspicious to health and life as the present month, other montha 

 have had a smaller number of total deaths but they were at ages indicative of 

 less favorable atmospheric conditions. 



Atmospheric pressure vciGiin, 29 '808, was + "083 only above the 20 years' 

 adopted standard. The daily fluctuations, and extreme range of the nionth, 

 were less extensive than is usual in November. The greatest movement of 

 the barometer, between any two 1 p.m. records, was a rise of + •532 on the 

 17th, being'less than for any November of the previous four years'. The greatest 

 fall, was — • '518 on the previous day, altogether there were ten days on which 

 the movements exceeded one-fifth of an inch. The extreme range of the 

 whole mouth was '956 of an inch, being considerably below that of the Novem- 

 bers of the two preceding years. The maximum was, 30 '236 on the 27th, the 

 minimum, 29^280 on the 16th. 



Wind force ioidl, was 136 '90 lbs., being + 27 '64 lbs. above the average of 

 the previous eight years, — 1863 and 1861, however, had both a greater aggregate 

 force than the present month. Last year's was not so much, by upwax'ds of 

 12 lbs., ivest and north-ioest were the predominant winds, exceeding the 

 average largely, both in frequency and force. All the other six points of the 

 compass were below the average in frequency, though east and south-west were 

 in excess in force, and the rest below. The greatest pressure noted at any 

 of the three — daily observations, was 10"42 lbs. to the square foot, and was 

 recorded with a north-west hot-wind at 1 p.m. on the 11th ; with a west-wind 

 at sunseb on the 16th; with an east-wind at 7 a.m. on the 19th; the latter 

 being a most remarkable occurrence. Calms, 8, were 2 "29 below the average of 

 the previous 7 years. 



Temperature vae^n .59 '23 degrees,is -f 1'44 degrees above the 20 years' mean, 

 and -f 1'16 more than November, 1864, had. The mean of all the maxima of 

 the self -registering thermometer was, 71 "50 degrees ; showing an unusually 

 great high-day temperature, and being + 1*27 more than November last year 

 had. The mean of all the records of the minimum self -registering thermo- 

 meter was 48.77 degrees, being almost identical with last year. The mean of 

 both is 60 "13 degrees. The maximum was noted on the 1 Itli being 95 degrees, 

 or 19 degrees above that of 1864 November, and higher than any November 

 of the previous 24 years — 1843, however, approached within half a degi-ee 

 of the present month. The minimum, or lowest night temperatm-e, was 39 

 degrees, recorded on the 17th. No November since 1856 has had so low a 

 minimum as this. The extreme range, 56 degrees, therefore, much exceeds 

 that in any November recorded, that of 1843 being only 49 "20 degrees. 



The mean daily-range of temperature was 22 73 degrees, being -f3'89 

 degrees above the 20 years' average, and -t-l*50 higher than 1864 had. 1862, 

 hovvever, had -f'20 of a degi^ee higher, but no other of the 24 previous years 

 approached nearer than a degree less than the present. The greatest range 

 of any day was 42 degrees on the 11th. This is the highest record for November 

 in 24 years, except in 1846, when 44*8 degrees was registered. The smallest 

 range was 13 degrees, noted on the 20th and 26th. On diseased, aged, and 

 enfeebled persons, these extreme ranges of temperatare had a very fatal 

 effect, though quite innocuous to young and healthy individuals. 



Solar-Tntensitt/ mean, 107 '73 degrees, is -1-1 "58 degrees above the average of 

 the previous nine years, and -f3'87 higher than 1864 had, 1856, only, had a 

 higher mean, 112. The maximum was recorded on the 11th, being 129 degrees. 

 Last year's was 4 degrees less, and no other year of the nine was higher than 

 120. The minimum solar-temperature was 71 degi'ees on the 26th. In this 

 month, contrary to what was reported for November, 1864, cloud mean, it will 

 be seen hereafter, was below the average. The mortuary record does not 

 indicate that this excessive sunshine was directly injurious to life. 



Terrestrial rac^ia^ ion- had a mean of 46.48 degrees, which is only '01 below 

 the nine years' average, and less than November 1864 had. The maximum 



