7 
T. E. Clark on Fichtelite iain North Bavaria. 171 
The action of bromine is of course similar to that : chlorine. 
Hydrobromic acid is given out, and higher or lower compounds 
are formed, as the quantity of bromine used is greater or oe 
The substance should = ‘melted in a flask and the bro 
added from time to tim 
This resin was dbbatiod pure for analysis by several re athe al- 
lizations from its solution in alcohol and ether. The combus- 
tions were made with chromate of pe} and with rolls “of fine 
oxydized copper wire in the front part of the tube. Three out 
of several analyses are here given. 
L bys grm. 8 substance gave 
arbonic acid and 
aa oe iakee: 
Ii. 04314 “ of substance gave 
13761 “ carbonic acid and 
04980 “ water. - 
TIT. 04008 “ of substance gave 
12859 “ carbonic acid and 
water. 
n, 86°89 87-00 87 50 
Hydrogen, 1286 12°88 1299 
s illows average uf the three and the corresponding formula are 
Average. Calculated. 
Carbon, 87:13 Cs 87:27 
Hydrogen, . 12 86 Hr 12:78 
" au es as the empirical formula for this resin apie. The 
Other analy ses ignite: this result. 
a reise men- 
: ‘Viz. with Fichtelite analyzed by Bromeis, with hartite 
Er by Schrétter, and with tekoretin and_phylloretin anal- 
Milas geen wn But first, we must al ude j a matter 
$ given us no little trouble. 
e above mentioned resins, with the exception of hartite, 
analyzed when the atomic weight of carbon was held to 
© 6'125, hence too much carbon was ‘almost always obtained in 
ann lysis, "Now 3 in books on organic chemistry, and in chem- 
on, Curnals when these fossils are alluded to, this faet seems 
Tally to have been overlooked. We will give two or three 
ees out of the very many which we haves notice 
Totter,* who analyzed hartite, compares 
the: te ined by Forchhammer for tekoretin, and remarks that 
7 tO Substances are very probably identical 1 in composition, 
and only pa in their melting points. We give the results as 
Obtained ach : 
= 
oe 
fe) 
a 
2 BE 
* Ann. d Phys, u. Chem, rel. lix, p. 44 
