NOTES ON THE METEOROLOGY AND MORTALITY OF 

 THE MONTH OF NOVEMliER, 1871. 



By E. Swarbreck Hall. 



The deaths this month were considerably above the average, though no 

 epitleniic disease jirevailed. There does not appear anything in the meteoro- 

 logical phenomena so adverse to health and life to have caused this excess in 

 the death rate, except excess of ozone and deficiency of sunshine, and gieat 

 elastic force of Viipour. 



Atmospheric pressure mean, 29"832, was +111 above the 25 years' standard 

 average. The extreme range of the month was 1'00."3 inches ; the maximum, 

 30 347, having occuned on the 10th ; the minimum, 29 •3-42, noted on the 24th. 

 The greatest range in any 24 hours was registered on the 9th, being — '407. 

 On only nine other days woie the mutations more than one-fifth of an inch. 

 There was therefore nothing unusually remarkable in the barometrical 

 movements to affect the death rate. 



Wind force total was 70"481bs., being — 35 "85 below the average for 

 November. The ozone bearing south-east winds were greatest in number, but 

 the north-ivest with the reverse character were above twice as much in force. 

 From the other points of the compass there was no remarkable deviation from 

 the standai-d average. The strongest Avind was a north-west on the 7th, having 

 a pressure to the square foot, at the sunset observation, of 15'621bs. Calms 

 were 16 in number, being + 6*33 above the average. 



Temperature had the mean of 58 "39 degrees by the observed thermometers, 

 but more than a degree and a quarter less liy the self- registering. The former 

 was only + '85 of a degree above the November average. The extreme was 

 maximum 73 on the 20th, the mininjum 37 in the night of the 4th. The 

 latter was therefore tlie same as in October, while the former was 11 degrees 

 less. The wet-bulb thermometer had the mean of 52 "05 degrees, which is 

 + '80 more than the average. 



Daily-range of temperature mean, 17*70 deg,, was — 1"38 below the average. 

 The greatest range in any 24 hours was 28 degrees, noted on the 4th. On 

 several days in the month fires were essential to comfort in sitting rooms. 



Solar-intcHsiti/ mean, 93 •20 degrees, being — 8 01 degrees below the average. 

 The numerous wei and cloudy days account for this. The hottest record was 

 110 degrees on the 28th. 



Terredrial-radiation mean, 44 38 degrees, was -t- 211 above the average. 

 The coldest record was 33 degrees in the night of the 4th. 



Elaatic-forcc of Vapour mean, 337, was + 12 above the average. This 

 condition of the atmosphere is adverse to health and life. The range was 

 from minimum 224 to maximum 550. 



Humidity mean, 69, was — 2 below the average. 



Rain-fall amounted in the aggregate to 3"02 inches, being +18 of an inch 

 above the average of this the wettest month in the year. It fell on 16 days, 

 which is + 318 above the average number. On the 23rd more than one- 

 third of the whole was precipitated, but in so moderate a way as not to cause 

 floods. The soil was kept moist during the whole month, greatly to the 

 advantage of vegetation ; and both the air and the surface of the earth were 

 well washed from impurities. 



Spontaneous Evaporation amounted to 3'51 inches. 



Cloud mean was 7 "69, being + 163 above the average, an unusual excess. 



Ozone mean, 8 38, was + "82 above the average. .At 12 observations 

 saturation (10) was recorded. The excess of ozone did not, as in the previous 

 month, tell so much on diseases of the organs of respiration, as the Avinds 

 were not so high, or so dry. 



Electricity had 12 positives, with tension ranging from 4 '5 to 8*5. The 

 negatives Avere 41, with tension ranging from 2'5 to 8"5. There were 7 nils. 

 There was a heavy storm of thunder, liylitniny, and rain on the 23rd. 



The Snoio of the previous month continued on Mount Wellington until the 

 .5th, when it received a very copious augmentation, but disappeared altogether 

 after the 9th. 



Deaths were 45, being + 7*6 — 14 above the average of the previous 14 years. 



