The Sun.
London, England, 1864-04-21 00:00:00

French Academy of Sciences,

At the last sitting M. Valenciennes produced a
tooth of enormous size found in the oolitic formation
of the neighbourhood of Poitiers. It belonged to
the genus crocodile, and its dimensions show what
a gigantic saurian the owner must have been. It
is conical, regularly rounded off, and slightly
curved ; the length of the outer side is
14 centimetres, that of the inner one 9i, indepen-
dently of the root. It is covered with a black and
striped enamel. The largest crocodile's tooth of
the living species preserved in the Cabinet of
Comparative Anatomy of the Garden of Plants is
not one-fourth of the size of this fossil one ; so that
if the same proportion was maintained in the rest of
the body, the fossil crocodile of Poitiers must have
been four times larger than the existing species of
the Nile, or about 100 ft. long. The Museum of
Poitiers contains fossil remains of other gigantic
saurians found in the same oolitic bed.—M. Ed.
Fournier produced an artificial larynx composed of
an India rubber pipe and several keys and pedals,
by means of which the action of the natural muscles
is imitated, and sounds similar to those of the hu•
man voice are produced. This apparatus is con-
structed according to the inventor's theory of
the production of sound, founded on a long
patient investigation of the construction and
action of the larynx.—M. Poey sent in a paper on
the azimuth rotation of clouds, in which he endea-
voured to show that the law of the rotation of winds
explained in 1827 by M. Dove is not only perfectly
applicable to clouds, but that it even is the rotation
of the latter which determines that of the lower
winds, and modifies all meteorological phenomena.
'lrrDov ecusrtraetnet o
states
that
thfat airwfhreonn: tinneequator the
blow northern hemi-
sphere,alter-
natelythepoi
wntisthofpothlaer
compass
rpeanstss ,
int a S.W.N.E.S. he wind veers round all
direc-
tion, and that the inverse direction takes place in
the southern hemisphere. M. Poey, by tables ecm-
prising 280,320 observations taken by him from
Jan. 1, 1862, to Jan. 1, 1564, shows that the same
is the case with the clouds, which he classifies into
fracto-cumuli nearest the earth's surface; and
cum/4 cirrocumuli and cirri, according to their
altitude, the last being the highest.

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