388 Miscellanies. 
tale; it has been described and analyzed by the Count Trolle Wacht-. 
meister ; its color is steel gray to brownish, yields on heating, water 
with some ammonia ; it contains silica 46.27, alumina 25.10, oxide of 
iron 15.60, magnesia "3. 80, protoxide of manganese 0.89, potassa 2.70, 
soda 1,20, water 6.00, and a trace of fluor, and has a formula of 
RSi-+ Alsi +H?, 
3. Infusorial Animals—Baron Von Humboldt presented to the 
Academy, from M. Ehrenberg, of Berlin, specimens of the argillaceous 
and peaty formation found beneath the city of Berlin, at twenty feet 
under the surface. It was full of small infusorial animals, all alive, 
with living ovaries, and capable of reproduction. He had discovered 
similar formations in other parts of Prussia ; and he mentioned as a 
curious fact, that of 1,728,000 cubic feet of matter taken out of the 
port of Swinemunde, on the Baltic, in 1840, one half of it was com- 
posed of microscopic beings. ‘The sandy plains of the Lamburg con- 
tained strata of fossil song twenty eight feet thick —Literary Ga- 
= Noo. 13. 
4. Coal Mines in Cuba. 
To the Editors of the American Journal of Science and Arts. 
_Gentlemen—In the belief that no account has appeared in any Amer- 
ican publication, of the extensive coal mine which has been discovered 
in Cuba, the progress made in the examination of which I have for a 
year or two past watched with much interest, I send herewith a notice 
pee by M. Castéles in the “‘ Diario de la Habana,” of the 7th 
of August. The mine is situated in the Partido de San Miguel, about 
six miles from Havanna, and is particularly interesting on account of 
its locality and the quality of the mineral. 
_The coal is of two kinds, one of which, denominated ‘“ chapapote,” 
is the most abundant. One hundred parts of this sell! fifty parts of 
len and afforded ane le 
_ Carbon 
ae £ - “ 71.84 
> . & - a f - . 622 
ak x Hydeogen, : 8.40 
_ Ashes composed of ae, ox. iron, Hon mn fies, 13.51 
ds 99.97 
men, Heo = esteem and respect, your friend and 
Joun H. Biake. 
