Meteorological Reports. 113 



view at forty yards. The densest fog, however, of the year 

 took place in November, for at midday on the 21st of that 

 month it was noticed that no part of the front of a house could 

 be distinguished at a distance of 30 yards. December, for a 

 winter month, had a remarkably clear atmosphere, as many as 

 23 days being altogether free from fog. Light fogs were 

 recorded on 47 days during the year, fogs on 25 days and 

 dense fogs on 10 days. 



Wind. 

 The most windy day of the whole year was the 2nd of 

 March, when the total velocity amounted to 681 miles. 

 During the afternoon of the same day 33 miles were recorded 

 in a single hour, which was the only occasion during the 

 twelve months, when a velocity of 30 miles was in any hour 

 exceeded. As in 1879 there was an unusual prevalence of 

 north-easterly winds during the spring months. 



Rainfall. 



At Addiscombe rain fell on 166 days (or on 31 less than in 

 •the previous year) to the total depth of 30-438 ins. 



Snow fell on only 12 days, and its greatest depth on a gravel 

 path at no time exceeded an inch. On a lawn however on the 

 2oth of October, it measured three inches. 



The spring quarter was most exceptionally dry, but on the 

 other hand, during the autumn, rain fell at frequent intervals, 

 and at times very heavily indeed. The first fall of rain 

 exceeding an inch in depth took place on the nth of Sep- 

 tember, and amounted to 1-33 in., and the second on the 14th 

 of the same month with a total of 1-17 ins. The third and 

 last (all three be it observed in the autumn quarter) which 

 occurred on the 9th of October (2-18 ins.) is worthy of special 

 notice as being with one exception, the heaviest fall of rain of 

 which we have in Croydon any record. I wish to draw more 

 particular attention to this one exception, because Mr. Mawley, 

 in " The Weather of 1880," states that the fall of rain on this 

 day was by far the greatest that had been known in Croydon 

 for at least 20 years. It was certainly by far the heaviest in 

 any " rainfall day " (between 9 a.m. one day and 9 a.m. the 

 next), but at 9 p.m. on the 26th of July, 1867 (the occasion 

 referred to) I measured 2-58 ins. as the amount deposited 

 during the previous 24 hours, which exceeds the heaviest fall 

 of the year under review by -40 in. 



Two most remarkable and almost unprecedented periods of 

 heavy rain occurred during the year, the first in September 

 when in the course of nine consecutive days (nth — 19th) 

 the total amounted to 3"98i ins. including two falls of over an 

 inch in 24 hours. The other in October, when the amount 



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