92 MR ROBERT COCKBURN MOSSMAN ON 



with a slight dip during the time of maximum cold. Gales were below, but fog much 

 above the normal. 



1881 to 1894. — Pressure was much above the normal ; the mean temperature, how- 

 ever, being just about the average during the ten years ending 1890, when the warm 

 winters were balanced by the cold summers. A drought prevailed during most of the 

 time. West winds were in excess, thunderstorms much above average, and gales 

 above the normal till 1888. During most of the time fog was uncommon. 



Frost Days. 



Table LX. shows the number of times the minimum temperature in shade fell to or 

 below 32° in each month during eighty-one years; the data from 1802 to 1823 were 

 obtained from the Edinburgh Advertiser record, while Adie's observations were utilised 

 from 1824 to 1831 and from 1840 to 1851. The values from 1857 to 1896 are from the 

 observations taken by the Edinburgh observers of the Scottish Meteorological Society. 

 The total number of frosts recorded was 5294, equal to an average of 65 per annum. 

 The annual number varied from 108 in 1879 to 33 in 1822. The maximum in one 

 month was 29 in January 1814. 



Table LXI. shows the values grouped according to winters, with date of first and last 

 frost. The maximum number of frosts was in the winter of 1878-79 with 116 cases, 

 and the minimum in the winter of 1821-22 with 28 cases. The mean date of first 

 frost is October 23, and the mean date of last frost, April 26. The earliest date of first 

 frost was September 22 in 1844, and the latest December 4 in 1811. The latest date of 

 last frost was June 8, 1814, and the earliest March 12, 1874. 



Table LXII. shows the values for each day in the year. 



Table LXIII. shows the number of times the minimum temperature fell to 20° or 

 below. The total number of cases was 239, equal to an average of 3 per annum. The 

 greatest number in any year was 19 in 1881, while there were twenty-two years without 

 any. The maximum in one month was 14 in January 1814, closely followed by January 

 1881 with 13 instances. The earliest date was October 15, 1824 with a minimum of 

 20°0, and the latest April 2, 1831, when the temperature fell to 17°0. 



