300 Mr. Hatchett's additional Experiments 
described, afforded oxalic acid, part of which was sublimed in 
the neck of the vessel. 
The residuum with water formed a brown solution, which 
yielded a pale \rellow precipitate with sulphate of iron. 
Muriate of tin produced a pale brown precipitate. 
Acetite of lead formed one of a brownish- white hue. 
Lime was copiously precipitated from the nitrate of lime in 
the state of oxalate ; but not the smallest effect was produced 
on solution of isinglass. 
O. Liquorice however afforded a different result ; for, al- 
though the solution after the process with nitric acid resembled 
in appearance that which was yielded by manna, yet the effects 
were not the same. 
Sulphate of iron, after twelve hours, produced a slight brown 
precipitate. 
Muriate of tin had a similar effect. 
Acetite of lead formed a brownish-red deposit. 
Nitrate of lime also occasioned a brown precipitate : 
And solution of isinglass rendered it very turbid, and pro- 
duced a yellowish-brown precipitate, which was insoluble in 
boiling water, and possessed all the other characters of gelatine 
combined with the tanning 1 substance. 
P. Guaiacum, the properties of which are so singular in 
many respects, afforded results (when treated with nitric acid 
in the manner which has been described) different from the 
resins, although its external and general characters seem to 
indicate that it appertains to those bodies. 
Nitric acid acted upon it with great vehemence, and speedily 
dissolved it. The residuum which was afterwards obtained, 
was also found to be almost totally soluble in water, and the 
