52 EEV. C. W. HAEVET METEOEOLOGICAL OBSERVATIONS 



Without a set of raean values, with which to compare one's 

 observations, it is difficult to demonstrate the peculiar features in 

 the meteorology of each year. Having, as yet, no set of my own, 

 I have temporarily supplied the want by comparing my observations 

 with the mean of the pressure and temperature values given in the 

 daily weather charts for London and Yarmouth. The means of 

 pressure given above are for the 10 years 1866-75 ; the means of 

 temperature, for the 13 years 1857-69 ; whilst in the matter of 

 rainfall, I have already a set of means for the 10 years 1870-79 for 

 this particular district. 



Looking at the two years, we find that pressure was most in excess 

 of the mean in a month of naturally low pressure, January ; tem- 

 perature showed the max. deficiency in each year in October ; while 

 in the matter of rainfall, the excess in 1880 occurred in July, in 

 1881 in August, affecting the harvest materially in both years, but 

 not to the same extent in the latter as in the former year. 



Pressure. — During the year the chief depressions occurred in 

 January, February, October, November, and December, in all of 

 which months the mercury fell below 29 ins. High pressures were, 

 on the other hand, attained in January, March, May, and December, 

 exceeding 30"6 ins. between the 7th and 11th of May. Regarding 

 it in its relation to the mean, the month of highest pressure was 

 October, and of lowest, February. 



Temperature. — -The extremes of cold and heat (if more polar 

 and tropical, respectively, in their nature than is usually the case) 

 occurred at a time when we should look for any excesses of the 

 kind. The following are the four highest maxima and lowest 

 mimima registered during the year : — 



Highest Maxima. Lowest Minima. 



(«.) July 15th 89°-6 {a) January 22nd 10^-7 



(6) ,, 5th 86-4 [b) ,, 24th 11-2 



(c) ,, 18th 85-8 [c) ,, 26th 11-5 



\d) ,, 14th 84-8 \d) „ 25th 11-7 



The warmest and coldest periods of 14 days occurred between 

 July 4th — 17th, and Jan. 13th — 26th respectively, of which the 

 following are the mean daily temperatures : — 



The warmest period last year, which occurred between Aug. 28th 

 and Sept. 10th, was about 2° above the mean for Aug. — Sept., 

 while the excess this year was only about l°-5 above the mean for 

 July. The most noticeable point is the diff'erence between the 



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