be precipitated by tam, in and chloride of mercury seems to indicate that it is a vegetable base, and that~ notwithstanding the assertion of Woskressensky, of its incapability of combining with acids, a closer study of its properties may prove it to belong, like thein, to that class. It is retnarkab[e that it:~ content of nitrogen is even greater than that of theiu, or coffein, wllich is considered as one of the most nitrogenized compounds among vegetable substances.