382 On Climate and the Supply of Labour 
Table I. — Mean Monthly Bakometrical Pressure and Tempera- 
ture at Valencia and Cork. 
Valencia. 
Cork. 
Months. 
Pressure. 
Temperature. 
Pressure. 
Temperature; 
Mean of 5 
Mean 
of 5 
Mean of U 
Mean of 13 
Years. 
Years. 
Years. 
Years. 
8 
Ob'ie 
lS6b 
kM. 
. only. 
-1870. 
8 A 
Obser. 
». 
only. 
1857-1867. 
1857-1869. 
29 
43 
Q 
29-813 
41-8 
895 
44 
1 
•934 
43-1 
874 
45 
4 
•823 
44-8 
922 
49 
2 
•894 
49-6 
29 
8G1 
52 
9 
•932 
53-5 
80 
105 
56 
7 
•998 
59-2 
.Tnlv . 
30 
016 
60 
0 
•959 
02-1 
29 
964 
58 
9 
•929 
60-5 
835 
56 
4 
•909 
57-0 
29 
920 
52 
9 
•833 
51^0 
30 
015 
46 
8 
•881 
44^5 
29 
814 
46 
3 
29-933 
4:3-2 
Mean for the year . . 
29 
915 
51 
1 
29-903 
50-9 
Note. — The barometric values for Valencia are obtained from values kept in 
ihe Meteorological Ofiice. All the other averages are computed by Mr. Buchan 
and published by him. 
An interesting illustration has been mentioned to me by Mr. 
■Scott from the climate of the Scillj Islands, which may be taken 
as an exaggeration of the climate of Ireland. He says : — 
In Scillj', the mean monthly temperature ranges only from 45° to 63°, 
being a less variation than at any other i:)lace in tliese islands. The north of 
])onegal and Shetland most nearly approach it. The resnlt of this very 
equable spring temperature is that vegetation is always going on, and no croj) 
ov fruit will ripen thoroughly. A few bad apples are the only fruit besides 
gooseberries. The plants that flourish tliere are sub-tropical, such as aloes, 
yuccas, mesembryanthemums, and, of c<jurse, large geraniums and fuchsias. 
'The produce of the islands is to a great extent vegetables for the London 
market, especially new potatoes. 
The climate is an exaggeration of your southern climate, such as Cape 
Clear ; the mean temperature for the year being 1° higher. The reason of the 
very exceptional climate of Scilly is due in some measure to the set of the 
■currents at the mouth of the English Channel. 
I think the suitableness of the Irish climate for growing pota- 
toes was one cause that led to the great extent of potato culti- 
vation there before the famine, which has hitherto been ascribed 
mainly to social and political causes. Till the blight, potatoes 
flourished in Ireland better than elsewhere, and therefore were 
more grown. 
In the South of Ireland corn ripens, but with difficulty, so 
that a good or bad crop of corn is more dependent on the cha- 
