328 H. Hennessy on the Distribution of Isothermal Lines, 
of sue 
perficial causes to explain all changes of climate, would lead to 
mote to the most recent geological epochs. But this is the very 
reverse of the conclusions deduced from the entire mass of | 
logical inquiries; hence, as far as observation enables us to Ju 
we cannot explain by superficial actions alone, the twofold cor 
ditions of the spheroidal shape in the earth’s figure, and the 
ual diminution of its surface temperature from the earliest 
periods of geological history up to the most recent. 
seuss 
Arr. —Note on the Laws which Regulate the Distribution 
sothermal Lines; by Henry HEnnzssY, F.RS., MRLA, 
rofessor of Natural Philosophy in the Catholic University 
_ of Treland.t 
In my essay on the Distribution of Heat over Islands,t hy 
ferred to another mode of treating the general propeee ‘7 
different from that already published, but as they are.a¢ pio 
nied with a few additional remarks relative to their pene 
_with the climatology of the globe, I may be permitted to Pot the 
* Proc. Royal 
ciety of Dublin, 
+ Cited from the 
