18 
collect in the neck of the latter, which on cooling as¬ 
sumed more or less of a crystaline' structure. 
The distilled portion when dissolved in alcohol and 
and ether crystalised like the original substance and 
possessed the same melting and freezing points; show¬ 
ing that it suffered no change by distillation. 
We may safely say that the boiling point is above 
320 0 C., for the thermometer was rapidly rising when 
it was taken out. 
A peculiar but agreeable odor was given out during 
the distillation, and a small part of the resin was de¬ 
composed, accompanied by the separation of coal. 
ACTION OF SULPHURIC AND NITRIC ACIDS. 
Anhydrous sulphuric acid produces a total decom¬ 
position of the substance. A small portion was put into 
a test tube, and to this the sulphuric acid was added, 
when, although cold, a violent reaction took place, 
fumes of sulphurous acid were given out, and the whole 
tube was blackened with coal. 
To another portion Nordhausen acid was added, 
and then heated in the water bath. Sulphurous acid 
was slowly given out, and the solution became deep red. 
In order to see if any combination with sulphuric 
acid had taken place, water was added and the whole 
heated with carbonate of baryta. The precipitate was 
separated, but the filtrate, which was greatly concen¬ 
trated by evaporation, yielded no crystals of any so¬ 
luble salt of baryta. 
