Carlsbad Waters and Uranium. 185 
ht fh i 5 abies su ire a Bae 
terformations, and partly by plants broug 
floods, and deposited. Hence the more delicate parts are 
preserved. As the cryptogamic monocotyledons which 
constitute nine tenths of the coal fossils are not articulated, 
grew where they are now found. ; 
e volume is illustrated by six lithographic plates, il- 
lustrating the Genera and Species described in the text, 
and exhibiting some of their analogies with existing veget- 
ables. 
2. Earlsbad Waters and Uranium. 
Extract of a letter from M. Berzelius, Stockholm, March 
20; 1822. 
“] have nothing of importance to communicate from my 
own laboratory, except ananalysis of the waters of Carlsbad 
in Bohemia, which I visited last summer. 1 have found in 
thetn many substances, which had not hitherto been found 
in mineral waters, viz. fluate af lime, Carbonate of strontian, 
Phosphate of lime, and phosphate of Alumine. 1) -sub- 
stances are found there dissolved in carbonic acid uncom- 
bined. The tufas, deposited by these waters, are arrag- 
onitic, which corroborates the idea of M. Stromeyer that 
it is the carbonate of strontian, which determines the arra- 
Zonitic form of this species of carb. of lime. 
M. Arfredson, who has been engaged in researches on 
to redness. The combinations of the yellow ene of Ura- 
iron, | 
same way and give metallic Uranures, which take fire when 
come in contact wi 
‘he experimeits are so easy that they can be made dur 
ihg a lecture.” 
Vou. VH.—No. 1 . 24 
