Scientific Intelligence. 279 
pump would throw out of action, and which becomes heated by fric- 
tion,—a liquid piston, not less incompressible than the other, filling al- 
sae exactly the space in which it moves, be it regular or not, and act- 
leulated, that its i agi 
elthough.; increasing, is always in relation: ne au force to be ov me. 
The air is thus compressed at 30 atmospheres in iron iaihun; pion 
are about 4 millimetres thick. It is perfectly preserved under this pres- 
_ and it was with a bottle of this kind that M. Julienne put in action, 
my presence, a small vehicle, carrying two persons, and moving 
with great rapidity. 
SCLES Ui. te Ce. CEN CE. 
I. Geotoey. 
4 sit of the School of Mines, and of Science applied to the 
Arts, Vol. London, 1852, 8°.—Contains oe and introduc- 
tory cently to the courses for the session of 1851-2. We would no- 
tice the lecture of Prof. Ed. Forbes upon ie Relations of "Navived 
> to Geology and the Arts, as particularly interesting to the sen 
ologist 
2. A pestered Map of sen? States and the Britith Proves 
ces of North America, with a lanatory teat, geological sits 
and 8 plates of the fossils which i toe gle the form ations ; by JuLES 
Marcov. Boston, 1853. 8°.—A com esac ituberation of the ee 
ology of the N. American Continen 
ures and descriptions illustrative of British wae remains. De- 
hich 
new genus from the chalk of Sussex. I is highly sratitying to the 
writer to see that the fossil fishes recently discovered in at Britain, 
are likely to be all described in a satisfactory manner by s econ etetl 
an observer as Sir Philip Egerton, whose collection of fossil fishes, in 
connection with that of his noble friend, the Earl of Enniskillen, is un- 
rivalled, L. A 
4. Histoire des progrés de la Géologie de 1834 a 1850, per 
cHiac. Paris, 1851. 4 vol.—This work, of which we have recently 
received the fourth volume, is not merely a history of the recent pro- 
gress of geology, but a real encyclopedia of all the branches of science 
related to geology, and ought to be studied carefully by every i woes 
gist and palzontologist 
5. Zeitschrift der deutschen geologischen — 4th vol. 
Berlin, 1852.  8°.—This and the eding volumes contain a. 
bern papers upon Geology and Galimeeha hit 
. rbuch a kaiserlich-kéniglichen geologischen Reichsanstall, 
Wien, 1852. —The third volume of a very valuable series of pa- 
pers upon a sore of subjects relating to Geology, Paleontology, and 
Mining. L. A. 
