A treatise on tobacco, tea, coffee, and chocolate : in which I. The advantages and disadvantages attending the use of these commodities, are not only impartially considered, upon the principles of medicine and chymistry, but also ascertained by observation and experience. II. Full and distinct directions laid down for knowing in what cases, and for what particular constitutions, these substances are either beneficial, or hurtful. III. The Chinese or Asiatic tea, shewn to be the same with the European Chamelaeagnus, or Myrtus Brabantica