276 METEOROLOGY OF 1860. 



The reading of the barometer was above its average value in February, April . 

 July, and October ; and in defect in the remaining months of the year. 



The mean reading of the barometer for the year, at the level of the sea, was 

 29-879 inches. 



The mean temperature of the air was above the average value of B9 years In 

 January by 3i°; March, by y ; May, by 1{° ; October, by lj° ; and below, in 

 February, by 2\°; April, by 3°; June, by 3i°; July, by nearly 4 D ; August and 

 September, by 3° ; November, by \>° ; and December, by 2J°. 



The mean high day temperature was above its average value in January, May, 

 and October, and in defect in the remaining months of the year. 



The mean low night temperature was above its average value in January, May, 

 and October, and below in the remaining months of the year. 



The temperature of the year 1X60 was 2"4° below the average value of the 20 

 preceding years. The highest temperature of the year was 7G'5° in May, and the 

 lowest 8° in December; but in some parts of the country it went below zero, 

 therefore the range of temperature exceeded 76°. 



The mean weight of a cubic foot of air was 548 grains in January, 539 grains 

 in June, 551 grains in December; and the average for the year was 513 grains, 

 exceeding the average value of the preceding nineteen years by 3 grains. 



The mean temperature of the air for the year was 47°; and that of the dew- 

 point was42-4°. The mean degree of humidity wasHO, complete saturation being 

 represented by 100. Rain fell on 192 days ! the amount collected was 32 inches. 

 The warm period, which set in on December 24th, 1869, continued till January 

 24th, 1800. Theexcess of temperature on the 1st day of the vein- wis hi', thai of 

 thesecond was 1 1°, and of the third was 13°, whilst a fortnight prei ious the tem- 

 perature was as much in defect; and from January 1st to the 24th, the average 

 daily excess was 4°. On January 25th, a cold period set in, at first not Be • 

 but became so afterwards, and continued, with a few exceptions, to Maj 8th. 

 From May 9th to May 26th, the days were warm, and their mean temperatures 

 were daily in excess of the averages to the amount of 5j°. From May 27th till the 

 middle of October the days were cold. During this interval the mean tempera- 

 tures were in excess on 11 days only, the average excess being less than 1°, whilst 

 on the remaining 130 days they were in defect, the average deficiency being l . 



On October 22, a warm period set in, which continued till the 1st of November. 

 The excess of temperature averaged 51° in excess. On November 2nd, a cold 

 period began, which continued till the loth, the daily defect averaging 1) . 

 From the loth to the 26th, the temperature was alternately in excess and defect. 

 On the 27th, the weather changed, and continued warm, with bni few exceptions, 

 to December 13, tho temperature averaging 8J" daily in excess. On December 

 14, a cold period set in, at first oot severely, but became so towards the latter en i 



ill the month; the average dally defect a BS 8) . 



On December 34, the highest temperature reached was' 98°; it fell toio'nt 

 night, and to>8°by 7h, ajoa. on the 26th; it then rose, by 9h. a.m.,to 12 .and 

 gradually to 80° by lOh. p.m., which was the highest temperature of the day. 

 on the 86th, the temperature ranged between 86 audSti ' ; on the •-7th, between 



•Js ' and 88 ' : "n the 29th, between 'J 1 and 88* : hut on the morning of the -".Mil . 

 it wis as low as 7° at 7h. a. in. ; at '.Hi. a.m., it wasll'/; at 10b. a. in., 94{ ; an in- 



crease of no leas t tan 10 taking place within one hoar 1 the temi erature then 

 , .I-.; by midnight, and t" 16 by 2h. p.m. on thaSOtn day, and a most rapid 

 thaw set in. 



The mean temperatures of December 84, 85, and 89, were 22 l\ 80*2°, and 83"0 



respectively. The previous Inst moes in December of daily temperaturas below 



88* are as follows : — 



isi 1, December 84, the mean temperature was 



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