310 TRANSACTIONS OF ROYAL SCOTTISH ARBORICTJLTURAL SOCIETY. 



falling on four days less than the average, and a deficiency of 

 sunshine. The mean temperature was 37° "3, or 2 0, 1 under the 

 normal, and varied from 40° "3 at Airds, 40° *1 at Lochbnie, and 

 39°"5 at Smeaton, to 32° 2 at Braemar, 32 Q- 6 at Leadhills, and 

 33 o, at North Esk Reservoir and Benquhat. On the 18th, at 

 Haddow House, the sheltered thermometer fell to 3°, and at 

 Braemar to 4". The mean rainfall was 1*31 inches, or 54 per 

 cent, under the average. There was a slight excess in north- 

 eastern districts, where heavy snow-falls were of frequent occur- 

 rence, but over large areas only from a tenth to a fourth of the 

 normal was collected. The precipitation was greatest, 3 '6 inches, 

 at Tillypronie, 3*5 inches at Haddo House, and 3 - l inches at 

 Lochbuie ; and least, 0'2 inch at Dalkeith, Stobo, and Cargen. 

 Bright sunshine was in excess at Fort William and Fort 

 Augustus, but in most other places there was a marked 

 deficiency. 



April 1900. — The weather of April was mostly cool and veiy 

 unsettled till about the middle of the month, but thereafter fine 

 and very warm, a shade temperature of 75° occumngat Aberdeen 

 on the 20th. Snow fell at many places on the 3rd, and in western 

 districts on the 5th. The mean temperature was 45° - 7, or 1 0, 7 

 above the average. In Shetland and Caithness in the north, and 

 over Galloway in the south, the mean values were in close accord- 

 ance with the normal ; but in the south-east there was an excess 

 amounting to 2° in the district lying between Tweeddale and the 

 Firth of Forth. The mean temperature was highest, 47°T, at 

 Smeaton, and 47° '0 at Glasgow and Leith ; while the hill stations 

 recorded the lowest values, Benquhat having a mean of 41°"1, 

 Leadhills 41 0, 2, and Braemar 41°-5. The mean rainfall was 2'66 

 inches, or 20 per cent, above the average, the excess being large 

 in the north-west of Scotland ; but there was a deficiency of from 

 35 to 50 per cent, "to the east of a line drawn from Peterhead, 

 and passing Braemar, Ochtertyre, and Rosewell to the mouth of 

 the Tweed, the prevailing winds having been, in crossing the 

 Grampians, drained of much of their moisture." The largest falls 

 were 9-5 inches at Glencarron, 9 4 inches at Lochbuie, and 5-9 

 inches at Fort William; and the smallest, half an inch at 

 Dalkeith, and close on an inch at Smeaton, Peterhead, and 

 Haddington. Bright sunshine was under the average; the 

 percentage of the possible ranged from 38 at Aberdeen to 24 

 at Braemar. 



