But, if we consider what may reasonably be supposed to happen to those who are in the opposite extreme of health and vigour; that is, the tender, delicate, enfeebled, whose solids are debilitated, their blood thin and aqueous, the appetite lost or depraved, without exercise, or exercising improperly; in short, where the disposition of the whole frame is altogether opposite to the inflammatory; the free and unrestrained use of this infusion, and such accompanyments, must unavoidably contribute to sink the remains of vital strength still lower. Between these two extremes there are many gradations; and, every thing else being alike, Tea will in general be found more or less beneficial or injurious to individuals, in proportion as their constitutions approach nearer to these opposite extremes. To descend into all the particulars would require experience and abilities, more than I can boast. Suffice it to say, that, except as a medicine, or after great fatigue, large quantities are seldom beneficial, nor should it ever be drank very hot; and, as hath been already mentioned, the finer Tea, the green especially, is more to be suspected than the common or middling kinds. SECTION XII. The experiments and observations hitherto related render it evident, that Tea possesses a fragrant volatile principle, which in general tends to relax and enfeeble the system of delicate persons, particularly when it is drank hot, and in large quantities. I have known many of this frame of constitution, who have been persuaded, on account of their health, to deny themselves this fashionable infusion, and received great benefit (SECT. VII.). Others, who have found their health impaired by this indulgence, are unhappily induced to continue it for want of an agreeable substitute, especially for breakfast. But, if such cannot wholly omit this favourite regale, they may certainly take it with more safety, by boiling the Tea a few minutes, in order to dissipate this fragrant principle (SECT. II. 1, and EXP. IV.) which is the most noxious; and extract the bitter, astringent, and most stomachic part (SECT. II. 2, and EXP. III.) instead of preparing it in the usual manner by infusion. An eminent physician in the city, frequently experiencing the prejudicial effects of Tea by drinking it in the usual form, was induced, from reading a dissertation upon this subject, published some time since at Leyden[93], to try the infusion prepared after another manner. He ordered the Tea to be infused in hot water, which after a few hours he caused to be poured off, stand over night, and to be made warm again in the morning for breakfast. By this means, he assures me, he can take, without inconvenience, near double the quantity of Tea, which formerly, when prepared in the usual method, produced many disagreeable nervous complaints.