"Certainly," continued the Doctor; "persons who join the social board already elated with some good news, or cause of unusual happiness; persons who talk much, and excite themselves in argument, are apt to become affected more speedily than those who hold themselves in the midst of the convivial scene sedate and taciturn. The mind, in fact, may exercise a considerable power of resistance against inebriation; for which reason, persons in the society of their superiors, under circumstances which render it necessary they should maintain the appearance of being always well conducted, drink with impunity more than they otherwise could, if they did not impose upon themselves this consciousness of self-government. We also observe the influence of the mind, in controlling, and, indeed, putting an end to a fit of intoxication, by making, doubtless, an impression on the heart and causation, when a sense of danger, or a piece of good or bad news, suddenly communicated, sobers a person on a sudden." "I have heard," observed the merry-faced guest, "that moving about--changing from one seat into another--will check the effects of liquor; and I have known persons who have left a social party perfectly sober, become suddenly tipsy in the open air. How is this to be explained?" "Precisely on the same principle," answered the Doctor, "upon leaving an overheated room, on your returning homewards, you expose yourself to an atmosphere many degrees below that you have just left. The cold checks the circulation on the surface of the body; the blood is driven inwards; it accumulates, consequently, in the internal organs; and sometimes its pressure is such on the brain, as to produce on a sudden the very last stage of intoxication. The limbs refuse to support their burthen, and the person falls down in a state of profound insensibility." "I have recently," said the host, "read in the Police Reports several cases of this description; and imagined that some narcotic drug must have been mixed with the liquor drank by such persons. Adulterations of some sort must go on to a frightful extent in gin-palaces." "Not by any means," answered the Doctor, "to the extent you suppose. It is said that the spirit dealer makes his whisky or gin bead by adding a little turpentine to it. Well! what then? Turpentine is a very healthy diuretic. It is given to infants to kill worms in very large doses. Then, again, vitriol is spoken of; but so strong is sulphuric acid, that it would clearly render these spirits quite unpalatable. I do not affirm that the art of adulteration may not occasionally be had recourse to, even with criminal intentions, for such cases have been brought under the notice of the authorities; but I do not believe the practice is so general as some persons suppose. I apprehend dilution is a more general means of fraud."