[ 22 6 ] 
rubbed together till they were thoroughly united ; 
then 6 ounces of fpring water were gradually poured 
on, the powder and the water were well incorporated 
by triture, and the mixture was fet by to infufe for 
twelve hours. Two ounces of it were then filtered 
through a double linnen cloth, the remainder flood 
thirty- fix hours longer; and was frequently (haken 
up, after which it was ftrained off. The fmell of 
the Bark was almoft entirely covered in both the 
infufions, which were ftrongly impregnated with the 
lime ; and had an extremely difagreeable flavour. The 
firft was of a pale colour, and poflefled but a flight 
degree of bitternefs ; the latter had a deeper tinge, 
and was equally bitter and naufeous. Neither of them 
ftruck a black colour with the chalybeate folution, 
which, as foon as it was added, occafioned a yellow 
fediment, that in a few hours fubfided to the bottom 
of the glafs. Compared with the triturated infufion 
Experiment IV. thefe preparations appeared to be 
much weaker both in colour and tafle. The refiduum 
did not fenfibly effervefee with oil of vitriol. 
Experiment XI. 
The deco&ions and infufions were found to be 
impaired in flrength, after (landing fix or feven days, 
though it was the winter feafon, and the weather was 
feverely cold ; the infufions became paler coloured, 
and at the fame time depofited a (limy fed i men t. 
The decodtion, at the end of feven days, aflumed 
almoft a milky hue, and ftruck but a faint black with 
the chalybeate folution. The Ample infufion alfo 
