34 Reviews—Daubrée’s Subterranean Waters. 
first heading is comprised a very full description of the mineralogical 
and petrographical constituents of the Earth’s crust, and their micro- 
scopical characters are particularly well illustrated. This is followed 
by a section on the Morphology of the rocks and of the Crust of the 
Earth formed by them, and their origin and formation are treated 
in another section. A general review of the different organisms 
occurring as fossils is also included in the Hylology, and figures 
are given of the principal representatives of each group. 
Under the second heading of the Formation of the Harth, the 
Archeolithic, Paleeolithic, Mesolithic, Keenolithic, Post-tertiary and 
Novir or Recent Groups are described, and their mode of occurrence 
and development in different parts of the Earth are fully referred 
to. Figures are given of the most typical sections in various 
countries and of the leading fossils of each group. 
In the third division of Geogeny or history of the Harth’s 
development, the relations of the Harth to the universe and to the 
solar system are considered, as well as its individual character as a 
planetary body. In the concluding sentence of this division and of 
the book the author states, that if from a geological standpoint we 
may draw a conclusion as to the future of the Earth from its past 
history, we may look forward to an almost unending period, as 
measured by human standard, of still higher development, and in 
the furthest distance there is the probabality of a gradual and finally 
complete refrigeration and the exhaustion of its waters. G. J. H. 
1V.—Les Eaux Sourrrraines 4 L’ Epoque ACTUELLE; LEUR REGIME, 
LEUR TEMPERATURE, LEUR COMPOSITION AU POINT DE VUE DU ROLE 
QUI LEUR REVIENT DANS L’ECONOMIE DE L’ECORCE TERRESTRE. 
Par A. Dausriz, Membre de I’Institut, etc., ete. Two vols. 
pp. 767, with numerous illustrations. (Vve. Ch. Dunod, Kditeur, 
Paris, 1887.) 
HIS important work bears about the same relation to “Les Eaux 
Souterraines aux Epoques Anciennes,” reviewed in our last 
Number, as the “ Principles of Geology ” does to the ‘‘ Elements,” 
inasmuch as it treats of causes now in operation. The author, from 
the position occupied by him, has had great opportunities for 
acquiring information on this most extensive subject from all 
quarters of the world, and the work conseqnently is the result, in 
part, of his own large experiences, and partly a selection from the 
information afforded by other writers. 
The first book, which is also the largest and most important, 
contains seven chapters devoted to the consideration of the phenomena 
in connection with the system (régime) of underground waters. 
He commences with an allusion to quarry-water, giving an extract 
from the results of M. Delesse of the weight of quarry-water per 
hundred of the wet mass, ranging from 20:66 in white chalk to 
0-08 in vein-quartz. In a previous review of Mons. Daubrée’s great 
work (Ktudes synthétiques de Géologie expérimentale) mention was 
made of the important part which this same quarry-water plays in 
the economy of the Harth’s crust, and of the interesting experiments 
