150 Scientific Intelligence. 
western part of the continent ; and the conclusion is reached that 
the cause of the great desiccation was climatological, and not a 
ee es of change vel, 
a Lectures on Physical ceoge aphy; by the Rev. Sciay! 
eee F.R.S., M.D. Dubl. and D.C.L. Oxon.; Fellow of 
Trinity College, and Professor of ‘Geslegs in the Diivcaies of 
ublin. . 386 pp. 8vo. Dublin, 1880. (Longmans, Green & Co., 
London. ST geod Haughton’s poi aa ag studies connected 
with certain points in physical geography have been of much 
service to geology. The lectures here Published with cheat be 
pended notes bring out some of these points, as well as many 
generally accepted views, and discuss a few others of like zoolge 
sa interest. Even if the results are in some cases unsatisfying, 
wing to the use of insufficient data, the work is an important 
santetietion to the science of terrestrial physics. 
The first lecture presents some recent views as to “the past 
ced and future prospects of the earth,” involved in the assumed 
the nebular hypothesis, and the recent inference of as- 
eal that fe earth’s day is » awiy shortening. 
sec reats of “continents and oceans, volcanoes and 
mountains.” The heights of cy antes and depths of oceans are 
briefly reviewed, and a few general deductions brought out as to 
axes (following the Agri remand of elevation, corresponding one to 
each as pr d of ivy dante one to each ocean, which axes 
ere 
8,000 to 12,000 feet durin the eis Ai of the "Tertiary peal 
the Miocene and Plio sone), i a oe 
height. The vast extent of these movements we the earth’s oie 
interi 
Lantien III considers ‘‘ - laws of climate ‘a atmospheric and 
oceanic hel ” Heat from the earth’s interior, and that 
from a ces sun are ore made the prominent sources of the 
earth’s early climates. But the author returns to the subject 
a note to the sixth Scape many pages in length, in which he 
applies to the case of the earth’s surface Rossetti’s law of cooling: 
on the supposition that the _— of heat is ‘ ie sun-heat alone; 
second, earth-heat alone; and, third, variations in the ther mal 
conditions of the earth’s PN ihe other ie Cae in each 
