( 362.) 
Y. Account of crystallized Owalic Acid produced from the Boletus | 
~ sulphureus. By Robert Scott, M.D. of Dublin. .. Communicated 
^y Dawson Turner, Esq. F.R.S. A.S. and L. S.. 
Read May 1, 1804. 
I MET with the S Boles sulphireus abit the middi al [Aug 
in a young state, growing on the trunks of old decaying cherry . 
trees. Having preserved a specimen, l after some time found a 
singular crystallization on the upper surface; and which may be — 
observed to have ruptured the investing coats of that surface. 
‘These needle-like crystals were formed on the fungus, in con- 
sequence of its drying only, as none were observable while. it 
remained on the tree. ‘That they are pure-oxalic acid, or at least 
combined with a. very small portion of - "vegetable fixed alkali, is 
arido from the taste, and by the tests of solutions of- lime and 
barytes. The fungus, after being freed from. the saline matter, 
- was distilled in an earthen retort, during which a quantity of 
watery fluid came over—a thick tar-like extractive matter—car- 
bonic acid gas—carbonated hydrogenous gas—and lastly, hy- 
drogenous gas. It was not observed whether azotic gas was 
- among the first. products ; but it probably was, as the watery 
| fluid "which came over in distillation contained- ammonia, which 
appeared by. the odour:and the fumes that were exhibited on - 
= Bolding a paper moistened with diluted muriatic acid over a mix- 
ture of the former with quick lime. The coaly residuum, when: 
burnt in the open ain, afforded by li xiviätion some “vegetable 
fixed alkali. . Sx = 
. That 
