SAUCY BARK. 
99 
of tannin was further confirmed by the sesquichloride of 
iron. The precipitate thus occurring is of a greenish-black 
colour, and is consequently identical with that existing in 
the tea-plant, kino, &c. 
Sub-acetate of lead precipitates gum in great abundance. 
Nitrate of silver and proto-chloride of tin also precipitate the 
infusion, the former of a dark brown, the latter of a dirty 
white colour. 
Tincture of iodine did not evidence the presence of starch. 
Water added to a tincture, prepared with strong alcohol, 
precipitates resin in quantity. 
A reddish, resinous and brittle extract is obtained by the 
evaporation of the tincture. 
The bark was treated with sulphuric ether, and the dark 
red tincture permitted to evaporate spontaneously, in order 
to ascertain the presence of fixed oil, but the dryness of the 
extract and entire freedom from greasiness afforded contrary 
evidence. 
The ethereal extract was acted upon by alcohol, and, ap- 
parently a perfect solution obtained, but after filtration, a 
green substance remained on the filter. This was found to 
be insipid and destitute of odour, insoluble in water, but 
soluble in alcohol and ether. The solutions in the last 
mentioned menstrua are precipitated by water, which 
facts, in connection with the foregoing properties, cause it 
to be regarded as chlorophylle. 
In the alcoholic solution of chlorophylle, a small amount 
of a white matter was observed deposited. On boiling, it 
was re-dissolved, and when the temperature had become 
reduced, was again thrown down. The quantity was so 
small that it could not readily be further experimented with, 
but is presumed to have been wax. 
The bark was subjected to distillation, without obtaining 
volatile oil, or any indication of its existence. 
A clear lixivium was prepared from the ashes of the 
