+ 176 T. E. Clark on Fichtelite from North Bavaria. 
First bromine combination. 
I. 0:4169 grm. of substance gave ~ 
1:1646 
x prenscny acid and mt 
O4151..* wa 
II, 038909 “ of re gave 
10886 “ carbonic acid and 
: 03867 “ water. 
Hence 
Found. 
Calculated. es i: 
Cso == "6315 "6186 "595 
Ho= 10970 11:063 1u'99 
Br = 12°%15 12751 13-05 
Second bromine combination. 
0°4823 grm. of substance gave 
: 0-257 “  bromid of silver. 
Hence 
Calculated. Found. 
Ch = 678 
He = 9605 
Br2 = 22592 22°673 
We have thus obtained nae four following formulas for ihe 
chlorine aaa bromine com 
CsoHe9Br1, laine CsoHssCls, CsoHesCla. 
Hence the rational formula for Fichtelite would seem to be! 
Calenlated. Found. 
C3 = 87273 87:13 
Hi = 12°727 12°86 
_ This is of course quite an unexpected result, although the ra- 
tional formula for none of these fossil resins has previously been 
determined. Other carbo-hydrogen substances have however 
been described with very high formulas, e. g., Melene and Cerené. 
The formula for th former is CeeHeo, and for the latter Oss 
Hs. Moreover both of the substances, ik that which we have 
analyzed, have many a the properties of paraftine, and form 
compounds with chlorin 
There are two Sifections to reducing this formula to CaoHss. 
| The first is that it gives an uneven number of hydrogen atoms, 
and secondly that in the first bromine compound it requires one 
half an atom (Bry) of bromine. Laurent and others have how: 
ver expressed half atoms in various formulas. 
