33 



was 42o'8, being 5°"6 above the average, and in December was 

 was 3-i°"9, being 0°'3 below the average ; therefore both days and 

 nights were cold in October and December, and were very warm 

 in November. 



The mean high day temperature of the air in January was 

 44°"4, being 1°'6 above the average of 41 years; in February it 

 was 47°'7, being 2°*3 above the average, and in March it was 

 i)b°'l, being 5°'l above the average. 



The mean low night temperature of the air was in January 

 35°"3, being l°-8 above its average; in February it was 36°"2, 

 being 1°'9 above its average, and iu March it was 37°"G, being 

 2°'3 above the average ; therefore the high day temperatures and 

 low night temperatures were both very warm, particularly the 

 high day temperatures in March. 



Diagram (Plate 1) slimving the mean feniperatwe of the air at 

 Blmkheath on every day from October 1, 1881, to May 31, 1882, 

 and the departure on every day from tlie average mean temperature. 



The diagram shews that the mean daily temperature of the 

 air, with very slight exceptions, was below its average'from 

 October 1st till November 3rd; the mean daily defect of tempera- 

 ture for these 34 days was 4°"8, the very cold days being October 

 5th, with a temperature 11" below its average, October 16th 

 with ll'-l below its average, and October 30th, 31st, and 

 November 1st, with ITS, 12°-6, and ll°-9 respectively below 

 their averages. On November 4th a warm period set in and 

 continued to December 7th, a period like the preceding, of 34 

 days in length, whose mean excess of daily temperature was 

 5°-4; of these, November 5th, 11th, 12th, 13th were ll°-4, 10% 

 ir*l, and lO'^ above their averages. From December 8th to 

 December 25th the temperature was mostly cold ; the average 

 daily deficiency of these 18 days was 2'-6, and the average daily 

 excess of temperature from December 26th to January 16th 

 was 6\ It was generally below its average from January 17th 

 to the 26th, the average daily deficiency being 2'-6 ; from the 

 27th it was warm, the mean daily excess of these five days being 

 4''-4. The first 1(1 days in February were cold, the average 

 daily deficiency of mean temperature was 3""3 ; a warm period 

 set in on the 11th of Februarj-, which continued with very slight 



