TRANSACTIONS OF THE SECTIONS. 33 
nn --------------------------ςΟς-Ῥ ----ς---ς-.-ς-ς-ς- 
‘Dates and Moon’s| Max. of 
age at 20’clock |therm, at 
Chiswick, 
p.m. 
1841, May 27| 82 
(6 days 
14 hours). 
1842, Junel3| 90 
(4 days 
16 hours). 
1843, July 5 88 
(7 days 
19 hours). 
1844, July 25| 92 
(10 days). 
1845,Junel2| 85 
(7 days 
13 hours). 
1846, July 5 95 
(11 days 
20 hours). 
1847, May 23) 89 
(8 days 
23 hours). 
1848, July 6| 88 
(5 days 
16 hours). 
Remarks. 
flashes bursting simultaneously from almost the whole cir- 
cuit of the heavens.” 
On the 29th of April (nearly a lunation before) the thermo- 
meter at Pencarrow in Cornwall was 80°, the maximum for 
the year there. 
The maximum for the year. At Boston in Lincolnshire, 
the 14th was the hottest day of the hottest June since 
1826*. 
The thermometer in Brighton as well as Chiswick, was at 
its maximum for the year. Extraordinary oscillations of the 
sea and great thunder-storms in different parts of Britain. 
On the 23rd of the preceding month (the day of the 
moon’s first quarter) the thermometer at Chiswick was 
at 91°, the maximum for the year, except that in the mar- 
gin; and in the evening an unusually severe thunder-storm 
was felt in Cornwali and Dumfriesshire, and the following 
morning at Boston and Liverpool.” On the 23rd of July (one 
lunation afterwards) it became very dark at Penzance, as if 
another thunder-storm were approaching, and the barometer 
fell to a considerable minimum, on which day there was 
another thunder-storm in Dumfriesshire. 
At Penzance, as well as Chiswick, this was the hottest 
day of the year (77°), except the 9th and 10th of September 
(three lunations afterwards), when it was one degree higher 
(77° and 78°). On the 13th of June an extraordinary oscilla- 
tionof the sea occurred at Folkstone, and a“‘terrific’’ thunder- 
storm at Chatham. 
At Boston in Lincolnshire, this was the hottest day since 
the 3150 of July1826. A great thunder-storm passed through 
Britain, having commenced in Mountsbay in the evening of 
the 4th. On the Ist of August (nearly a lunation afterwards) 
London was visited with a hail and thunder-storm more de- 
structive than any there since the 18th of May 1809. On 
each of these days (5th of July and Ist of August) there 
was an extraordinary agitation of the sea in Mountsbay. 
The highest temperature for many years at so early a time 
of the year. Extraordinary agitation of the sea along the 
coasts of Cornwall and Devon. 
Mr. Glaisher, of the Greenwich Observatory, remarks, 
that this was the hottest day of the year throughout the 
country. Extraordinary oscillations of the sea on the fol- 
lowing day at Lyme, Dartmouth, &c. On the 11th of May 
(nearly two lunations previously), and almost exactly twelve 
lunations after the 23rd of May 1847 above mentioned, the 
thermometer atChiswick was 84° ; and it is remarkable that 
the temperatures on the two last-mentioned days were not 
only the highest for those years up to such times, but higher 
than for exactly fifty days afterwards in each case, except 
that on the fourth day afterwards in the one case, and the 
fifth day in the other, it was one or two degrees higher. 
* This day, and almost every subsequent day mentioned in the present communication, to 
the end of 1845, have been before noticed by the author in his paper above referred to. The 
days in 1846, 1847 and 1848, have been also noticed by him in the Report for 1848 of the 
1850. 
Ἢ Royal Institution of Cornwall, p. 53. 
D 
