30 VEGETATION OF THE PEAK DISTRICT i 
registered at the two lower altitudes! respectively, and 
(3) December 21st, when — 5°4° C. was registered at 335 metres. 
On the days when observations were made, the temperature, 
during 1908, did not fall to zero (C.) from May to November 
inclusive, nor, during 1909, from April to October inclusive. 
The following table shows the number of days during 1908 
and 1909 when the temperature failed to rise above zero at 
an altitude of 350 metres :— 
1908 1909 
January 11 days out of 26 7 days out of 25 
February 2 days out of 25 12 days out of 24 
March 1 day out of 23 7 days out of 27 
April 2 days out of 25 O days out of 22 
November O days out of 25 2 days out of 22 
December 6 days out of 27 6 days out of 24 
Total 22 days out of 151 34 days out of 144 
There is very little growth discernible in the vegetation of the 
Peak District at altitudes above about 1100 feet (335 m.) until 
the month of May: growth almost ceases in October; and from 
November to April inclusive, weather of a wintry type alter- 
nating with moderately mild intervals may be expected. These 
are much more severe conditions than exist in the lowlands, and 
are doubtless related to the meagre flora of the uplands, as 
the edaphic conditions of both the lowlands and the uplands of 
England in the latitude of the southern Pennines are practically 
identical. 
Direction of the Wand 
The figures in the tables on p. 31 are arranged to show, as far 
as is possible, the relative prevalence of warm and moist winds, 
1.e., westerly and southerly winds (N.W. to S.S.E.) and of dry 
and cold winds, 2.¢., northerly and easterly winds (S.E. to 
N.N.W.). It will be seen that the warm and moist winds 
prevail approximately on two days out of every three, and that 
(as might have been predicted) there is little change of direction 
at the three chosen altitudes. Direction of wind therefore is 
1 Readings at the upper altitudes on these days were incomplete. 
