C 22 5 ] 
Experiment VIII. 
Half an ounce of powdered Bark was infufed 
forty-eight hours in five ounces of fpring water, and 
one ounce of white wine vinegar. The mixture 
was placed near a warm fire, and frequently (haken 
up. It was then filtered through a linen rag 
doubled. The tafte of the vinegar was in a good 
meafure covered, though the fmell was not ; but the 
menftruum was not fo fully impregnated with the 
flavour of the Bark, as the infufion Experiment I. 
One dram of the chalybeate folution was added to 
this acid infufion. At firfi: no change of colour 
took place, but in a few hours a flight black tinge 
appeared. 
Experiment IX. 
Half an ounce of powdered Bark was well tri- 
turated, in the manner defcribed in Experiment IV. 
with fix ounces of warm water, after which the mix- 
ture was poured into a bottle, placed near a fire, and 
frequently (haken up. This procefs lafted forty- 
eight hours. The infufion, when (trained off, was 
found to be more perfedtly impregnated with the 
Bark, than the triturated infufion in cold water, 
Experiment IV. as appeared by comparing their co- 
lour, tafle and fmell, and by the deeper black which 
it inftantly afiumed on the admixture of one dram 
of the folution of Jal martis . 
Experiment X. 
v 4, 'T - i i T ’ *. * ‘ : • 
Half an ounce of powdered Bark, and two drams 
of ftone quick-lime, warm from the kiln, were 
Vol. LVII. G g rubbed 
