190 
J. HOPKINSON—METEOROLOGICAL OBSERVATIONS. 
period was from 12th to 19th, with the mean 60°*7, being 4°*5 
above that of the month, and the mean max. 71°*2, being 7 0, 6 above 
that of the month. Max. temp, above 62° on 21 days, above 72° 
on 3 (l7th-19th) ; min. below 42° on 2 (6th and 9th). From 1st 
to 11th there were only three days without rain (3rd, 6th, and 
9th), none fell between 12th and 19th, the warm period, and from 
20th to the end of the month there were only two days without, 
21st and 22nd. On the day of max. fall, and the following day, 
pressure was very low, being 29*280 ins. on 29th and 29*329 ins. 
on 30th. The first week and the last week in the month were 
very windy. On the 17th there was a violent thunderstorm with 
heavy rain in the north of London. At Watford, however, the sky 
was cloudless and the atmosphere calm, and no rain whatever fell 
during the day. 
October.— Warm, with a rather dry atmosphere of average 
pressure, and with less than the average rainfall. There was no 
decided change in temperature, but there were two periods of seven 
days each—1st to 7th, and 18th to 24th—with the temperature 
not above the average. Max. above 52° on 25 days, above 62° on 
5 ; min. below 42° on 8, never below 32°. The first 5 days were 
wet, the next 8 without any rain, more than an inch fell on 14th 
and 15th together, and the weather became gradually drier and 
at the same time duller and calmer for the last fortnight. 
November. — Rather mild, very wet, and with a humid 
atmosphere of rather low pressure. There was one cold period, 
10th to 17th, and one rather cold day during the warm period 
(23rd, mean 38°*1). 
1st to 9th . 9 a.m. 44°*3 Mean Min. 32°*1 Mean Max. 51°*7 Mean 42°*7 
10th to 17th. „ 36*9 ,, 29*9 „ 45*8 ,, 37*5 
18th to 30th. ,, 43*4 ,, 36*8 „ 50*7 „ 43*6 
Max. above 52° on 7 days; min. below 32°on 8 (7th, 12th to 17th, 
and 27th). Rain fell every day from 4th to 10th, and every day 
hut one (16th) from 14th to 25th. About an inch fell on the 4th 
and 5th together, and over an inch and a half from 23rd to 25th. 
There was a slight fall of snow on 14th, and a very heavy 
fall on 22nd. 
December.— Yery mild, dry, and dull, with a dry atmosphere of 
very high pressure. The only really cold days were the 7th and 
8th (mean 32°*8), and there were two very warm days, the 13th 
and 14th (mean 49°*5), followed by a very decided fall in tempera¬ 
ture. Max. above 42° on 17 days, above 52° on 3; min. below 
32° on 5, all before 10th but one (24th). Rain fell every day from 
9th to 17th, and 25th to 29th; and snow on 5th, 6th, and 16th, 
and also, but too slight to measure, on 7th. There was a gale of 
wind on the night of 11th-12th, and the weather was generally 
stormy from 10th to 19th, and comparatively calm for the remainder 
of the month, with dense fogs for four days in succession, 24th 
to 27th. 
