316 Terrestrial Climate as influenced by the 
‘Art. XXXIV.—Yerresirial Climate as influenced by the Distritu. — 
tion of Land and Water at different geological epochs ; by HENRY — 
Hennessy, F.R.S., M.R.I.A., Professor of Natural Philosophy 
in the Catholic University of Ireland.* 
The changes of state which frequently take place ome 
whether by evaporation or condensation, freezing or Ligne a : 
introduce agencies which still further complicate the study 
When we study the thermal conditions of a liquid dis ibuted 
over the terrestrial spheroid, it becomes manifest, that these 
vrs ; ted wit 
to develop certain views which are closely connec nation of heat 
hen a surface, covered with ordinary soil, bh 
rays of the sun, the heat thus acquired passes down 
arriving at a very small depth its intensity rapidly caw. there 
The solar heat which is thus received by the groun cap supert 
fore, be considered as confined almost entarely toa mes heat 
over such solid surfaces.t ceives the 
a put o8 
heated ground. During the night a different Ces | an 
place; for then the radiation of the soil causes 18 temp 
* Cited from the Atlantis, for January, 1859. : 1 306. See 
+ On the Distribution of Heat Over abasic etc., Atlantis, Mo pal Lines, 5° 
also so Note on the Laws that Regulate the Distribution of 
iii, p. 201. 
