wind: the forms of the isothermal lines will undergo important 
changes. If these eminences are scattered around the coast, 
their influence shall be greater than if they were all concentrated 
ards the interior of the island; for, in the former instance, 
they will present a kind of barrier, more or less broken, een 
the air resting on the central plains and the air outside covering 
the ocean. e sea breezes will no longer exercise the same 
effect on the portions of the interior situated behind the moun- 
tains, while their influence will remain unchanged, or be even 
iereased, on the portions still unscreened from the ocean, A 
T sometimes recede towards the interior, at the intervals be- 
“en the mountains. If the interior of the island does not 
Consist entirely of dry plains, but is covered with lakes and con- 
Siderable are ‘ i 
ik will cool the surrounding air. If the evaporating surfaces, 
fag wentrated chiefly about the centre of the island, their i 
D 10° 
Sa in other words, to contract or enlarge the dimensions of 
gis " €isothermals, a 
a the . the influence of the differences of latitude of the su ace 
Reo lan now considered, it can be demonstrated that its 
OND SERIES, Vor, XXVII, No. 81.—MAY, 1859. 
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