394 Dr. Pearson's Observations and Experiments 
The distilled liquid while hot smelt like newly baked bread, 
and was perfectly transparent and yellowish. The paper 
stained with turnsole was not reddened ; nor was that which 
had been immersed in solution of sulphate of iron turned to 
a blue colour, upon moistening it with ley of pot-ash. 
(d) The flame of a candle being applied by means of a 
blow-pipe to the extractive matter (c), the whole of it was 
burnt away, except what produced a black mark upon the 
spoon ; in which no trace of alkali was detected by paper 
stained with turmeric. 
(e) About 100 grains of the yellowish transparent liquid 
(c) being evaporated till it grew turbid, after being set by for 
a night, afforded acicular crystals; which under a lens ap- 
peared in a group, not unlike the umbel of parsley. The whole 
of these crystals could not, probably, have weighed a quarter 
of a grain. They tasted only bitterish. 
(/) One hundred grains of the yellowish transparent liquid 
(c) being evaporated, in a very low temperature, to dryness, 
a blackish matter was left behind, which did not entirely dis- 
appear on heating the spoon containing it very hot in the 
naked fire ; but on heating oxalic acid to a much less degree it 
evaporated, and left not a trace behind. 
(g) Carbonate of lime (chalk) readily dissolved, with effer- 
vescence, in the liquid (c). The solution tasted bitterish, did 
not turn paper stained with turnsole to a red colour, and a 
copious precipitation ensued on adding to it carbonate of pot- 
ash (mild vegetable alkali). A little of this solution of lime, 
and also of alkali, being evaporated to dryness, and the residue 
being made red-hot, nothing remained but carbonate of lime, 
and carbonate of pot-ash. 
