"But how do you explain the circumstance that death sometimes happens suddenly after drinking spirits," asked the host, "before there can be time for absorption to take place?"
"I remember, not many years ago," interrupted the merry-faced guest, "a water-man, in attendance at the cab-stand at the top of the Haymarket, for a bribe of five shillings, tossed off a bottle of gin, upon which he dropped down insensible, and soon died."
"This may clearly be accounted for," observed the Doctor. "The stomach, as I premised, is plentifully supplied with nerves, and is connected with one of the great nervous centres in the body, so that a sudden impression produced upon these nerves, by the introduction of a quantity of such stimulus, gives a shock to the whole nervous system, which completely overpowers it. From the centre to the circumference it acts like a stroke of lightning, and the death is often instantaneous. A draught of iced water taken when the system has been overheated by exertion, by dancing or otherwise, has been known to be immediately fatal. The physiological action—or rather the 'shock' upon the nervous system, is in both cases the same—violent mental emotion will in like manner suspend the action of the heart and produce instant death. These are the terrors of alcohol, when drank to excess; but the health of the habitual tippler is sure to be undermined; his hands become tremulous, he is unsteady in his gait, his complexion becomes sallow, and all his mental faculties gradually impaired."
"To what, may I ask," inquired the merry-faced guest, "do you attribute the circumstance of the trembling hand recovering its steadiness, after taking a glass of spirits in the morning after a debauch; 'hair of the dog,' as it is called, 'that bit overnight?'"
"Action and reaction is the great law of the animal economy," replied the Doctor; "over stimulation will always produce a corresponding degree of depression; when, therefore, the nervous system has been over-excited by alcoholic liquors, the usual amount of nervous energy which is necessary to give tone to the muscular system is wanting, and then a stimulus gives a fillip to the nervous centres, which restores the nervous powers to the extremities. When this state of things, however, has been permitted to go on, and the brain has been frequently brought under alcoholic influence, its structure becomes affected, and a slow and very insidious inflammation takes place, which terminates in a softening of its substance. This mischief may proceed for a considerable period without being suspected, but on a sudden delirium tremens may supervene, which will terminate, perhaps, in paralysis—perhaps death!"
"To what, Doctor," inquired the Clergyman, "do you attribute the mental pleasures of intoxication? Can this be explained upon physiological principles?"
"Easily, I think," answered the Doctor. "All inebriating agents have a two-fold action—as I have already pointed out—first, on the circulation; and secondly, on the nervous system. There can be no doubt that the mind becomes endowed with increased energy when the circulation through the brain is moderately quickened. This has been proved by observation. The case has been reported of a person who having lost by disease a part of the skull and its investments, a corresponding portion of brain was open to inspection. In a state of dreamless sleep the brain lay motionless within the skull; but when dreams occurred, as reported by the patient, then the quantity of blood was observed to flow with increased rapidity, causing the brain to move and protrude out of the skull. When perfectly awake, and engaged in active thought, then the blood again was sent with increased force to the brain, and the protrusion was still greater. Under all circumstances, increased circulation through the brain gives rise to mental excitement, and sometimes to an unusual lucidity of ideas. It is observed in the early stages of fever, and even in the dying—and this accounts for the clearing up of the mind which sometimes occurs in the last moments of life—what is called familiarly 'the lightening before death.'"
"That," observed the Clergyman, "is a very curious circumstance, which I firmly believe; and you account for this, if I understand your meaning, by explaining that the blood which no longer circulates in the extremities, which may have become cold, flows with increased impetus through the brain."
"Exactly so," replied the Doctor; "and upon this very principle, the rapidity of ideas, and the pleasurable mental excitement attending that temporary state of intellectual exaltation, depends on the increased rapidity of the flow of blood through the brain; but when this becomes carried to too great an extent, and the rapidity of the current disturbs the healthy condition of the brain, then the manifestations of the mind necessarily become impaired, the ideas are no longer under the control of the reasoning faculty, and the bodily organs, usually under the dominion of the will, no longer obey its mandates. This I believe to be the true theory of mental intoxication."
"But there are many circumstances," observed the host, "which may accelerate or retard this excitement."