Geology and Mineralogy. 151 
of Roman coins at the Warm Springs of Bourbonne-les-Bains, and 
also of similar formations at some other localities; and, aft 
stating the facts, the chemistry of the phenomena and the geo- 
logical inferences from the facts are learnedly presented. 
rotessor Daubrée’s next subject is Experimental illustrations of 
d Und 
the origin of metamorphic and eruptive rocks. er this head 
, 8 
with mechanical problems: (1) the making of sand-beds and 
rae ag 
of heat in rocks by mechanical methods. All the modes of experi- 
Science of ology ; moreover it is made highly attractive by its 
— _ publication and the beauty of its illustrations, — 
. Nov., 
had a total thickness of 6524 feet, the Upper Greensand 28 feet, 
the Gault 160 feet. Below this was a bed three to four feet thick 
of phosphatic nodules and quartz pebbles; and then a calcareous 
Stratum, more or less sandy, and part of it oolitic, sixty-four feet 
thick, which was shown by its fossils to represent the Lower 
8, having a dip of 35 se 
five feet; they afforded the fossils Spirifer disjuncta, Khyn- 
chonella cuboides, and other Devonian species. The rocks 
