46 SCIENTIFIC SURVEY OF ABERDEEN AND DISTRICT 
Crathes and Ellon, December is somewhat wetter than November, while 
at the three westerly stations November is the wetter of the two, and at 
New Deer both months have practically the same precipitation. 
The annual rainfall is less along the coast than it is inland, ranging 
from 29-5 ins. at Aberdeen to 35-4 ins. at Braemar. Logie Coldstone, 
probably on account of its sheltered position, receives rather less rain 
than might be expected from its height above sea-level. 
Aberdeen lies just within the 30-in. isohyet which runs down the east 
coast of Scotland, but there have been occasions on which that value has 
been departed from considerably. In 1872 Aberdeen experienced its 
wettest year, when 44 ins. were recorded, while the driest year was 1921 
with only 17 ins. The wettest month so far recorded was December 1876 
with nearly 9 ins., and the driest was March 1929 with only one-fifth of 
aninch. The heaviest fall in 24 hrs. was 2-8 ins. on November 7, 1873. 
SuNSHINE.—Sunshine records are available for Aberdeen Observatory 
and are set forth in Table III. 
TasLe II[J.—SuNSHINE AT ABERDEEN. PERIOD 1881-1915 
H Per Per 
ours t Hours aig 
Month. per oe ; Month per ae 
By Possible : Day. Possible 
January 1°55 21 August . oot Bee a2 
February 2°59 28 September el Anas 32 
March otis 4 32 October . ial SEO 30 
April . 5°27 a7 November i), BGR 23 
May . 6:03 32 December Sah Leo 17 
June . 6-13 35 : 
July 5°53 30 Year : il Sho er : 
Aberdeen lies within the sunny strip running along the east coast of 
Scotland ; April and May, each with 37 per cent. of the possible sunshine, 
are the months with clearest skies. In April 1906 the unusually high 
value of 56 per cent. of possible sunshine was recorded, and in September 
of the same year the figure was 53 percent. Contrasted with this bright- 
ness, December 1903 had only 34 per cent. of the possible. 
Records taken at Crathes over the same period show a yearly average 
of 3-65 hrs. of sunshine per day, or 30 per cent. of the possible, thus closely 
approaching the figures for Aberdeen. 
At Braemar a sunshine recorder has been in use since 1929, but its 
exposure was at first unsatisfactory and a considerable amount of sunshine 
was cut off by buildings and trees in the neighbourhood, so that a direct 
comparison with Aberdeen values is not possible. But over the period 
