314 METEOROLOGICAL NOTES. 



July was cooler and wetter than usual here, but not so much so as to the east 

 of Bodmin. The mean maximum was 24, the mean minimum 1"4 below the 

 average for the month. At Altarnun, Mr. Tripp notes, "on 20th a heavy local 

 rain ; a waterspout burst on the " West Moors," causing a destructive flood in 

 the S, branch of the Inny." On the 14th there was a rainfall of 242 inches at 

 Liskeard, and 2 inches in 16 hours at Plymouth. Heavy and very destructive 

 floods occurred in various parts of England. 



August was on the whole a fine month for the harvest, which was generally 

 well saved. The mean temperature was 62'1, being just 1° above the average, 

 that of the maximum (70'2) 1'5 in excess ; of the minimum (54'4), only 0'2. There 

 was no extreme heat, the maximum registered being 77° ; nor great cold at night, 

 the lowest point reached being 42°. At Penzance, the maximum was 70° ; Helston, 

 78; Bodmin, 74, the mean temperature of the month there being 65'3, exceeding 

 the average by 3'7. At Liskeard, the maximum was 73o, and at Plymouth, 72°- 

 At Altarnun, as usual, the heat was greater, the shade temperature was over 

 80° on 3 days, and the mean of the 16th, the warmest day of the summer, was 

 71", the average of the maxima of the whole month being 73'68. At Truro and 

 Helston the rainfall was slightly above the average of the month, owing mainly to 

 an exceptional flood on the 8th, amounting at Truro to 1"36 inch ; but at Bodmin 

 distinctly below it, and much more so at Altarnun. There was a smart thunder- 

 storm throughout the county on the 8th ; more partial ones occurred on the 

 3rd, 7th, 10th, and 15th. 



September was decidedly a summer month till towards its close The mean 

 temperature (61'4), was 2'8 above the average; the mean of maxima (68o), was 

 2'3 above ; the mean of minima (54'8), was 3'4 above; the absolute maximum was 

 76°, and the greatest cold 41". At Bodmin the mean temperature (63-3), was 3-9 

 above the average ; and the other stations present little difference. The latter part 

 of the month was still warm, but wet, and the rainfall considerably exceeded the 

 average of the month at all our stations. This was chiefly caused by some heavy 

 floods, especially those of the 17th and 21st, when about 2^ inches fell at Truro 

 and Plymouth ; no less than 274 inches having been recorded at Bodmin for the 

 17th alone.* The following remarks on the weather during the quarter, by Mr. 

 Glaisher, are interesting in regard both to points of agreement with and of 

 difference from the history of our own climate. " Following a period of warm 

 weather of 45 days duration, ending 10th June, one of cold began, and continued 

 throughout the month of July, and till the 5th of August, being of 56 days 

 duration, foi- which the average daily deficiency of temperature was 31. On 6th 

 August, a warm period set in, and with very slight exceptions continued till the 

 end of the quarter ; for a few days about the middle of August, and for a week 

 following the middle of September, the weather was very warm. The average 

 excess of mean daily temperature for these 56 days was 3^2. It is remarkable 

 that in the interval beginning 11th of June and ending 30th of September, there 

 should be two periods of equal length, viz., 56 days each, one of warm, and the 

 other of cold weather, and that their respective departures from their averages 

 should have been to almost the same extent." 



* Nuts, berries, and most fruits were plentiful. Wasps were unusually few. 



