“Me der eel be ee ee a Se OAT 
WOOPEUOCW. HE 
the mollusca having been enclosed at the period of its formation. 
A microscopical examination detects with a low power innume- 
rable portions of the nacreous laminz of the shells of extreme 
thinness, intermingled with the carbonaceous ‘matter, together 
with numerous siliceous spicule of sponges, very minute spines 
of echinoderms and fragments of Polyparia; these extraneous 
bodies probably became entangled among the soft animal matter 
before the latter had undergone decomposition. 
If my inferences be deemed correct, the term snitbaaliné would 
bea proper designation for the substance in question. — 
-N.B. This memoir was illustrated by drawings and numerous 
specimens of the molluskite; in some instances forming large 
‘amorphous carbonaceous masses in the sandstone, and in others 
filling the shells of the Trigonie, Terebratule, — 
~ Crescent Lodge, Clapham Common, (Eng.) January, 1843. 
Eiristence of Radicals in the A 
£ 
Arr. UL. —An spelt to refute the arguments advanced in favor 
- of the Existence, in the Amphide Salts, of Radicals consist- 
- ing, like Cyanogen, of more than one element ; by Rogert 
“Hae, M. D,, Prof. Chem. Univ. Pennsylvania. 
(Concluded cowed 65.) ie <Sghiowe pee. 
. 46. Respecting the new ‘principles which I Uhave been contest- 
_ ing, Dr. Kane alleges “ that the elegance nd sin iplicity with 
which the laws of saline combination 1 may te traced ‘from them 
is ‘remarkable,” because he ‘conceives, that without an appeal to 
‘those principles, the fact that the number of ‘equivalents of acid 
in a salt are ‘proportionable to the ‘number of agtraleny of oxy- 
gen in the base, would be. inexplicable. , 
_ AT. Thus, when the base is a protoxide, we have one atom of 
the protoxide of hydrogen to. take its place ; when the base is a 
sesquioxide (two. of radical and. three of oxygen, ) three atoms of 
the protoxide of hydrogen take its place : if the base be a i 
two atoms of the Ae of dada take its Ace: 
— 
* * Dr,Mantell yoy eat sock ad as to henna to us, in illustration of hie: memoir, 
very ‘distinct and satisfactory specimens of the molluskite, together with ammo- 
nites from the Kimmeridge clay, having td beta in good preservation ; 
also belemnites with their chambers preserved.— 
