We have already stated that if the muscles of respiration be paralysed, the animal can no longer breathe; and it dies in a state of suffocation. There are several mechanical modes by which such a condition may be produced; a person buried in a heap of ruins, although his head should be free, will perish from the pressure of the surrounding rubbish preventing the due action of the respiratory muscles. It was in this way that criminals who obstinately refused to plead, often died under the pressure of the weights that were heaped upon their bodies.[[50]].
There is a mode of suffocation, described by Galen, as being practised by the slaves when brought into the presence of the judges or executioners; it consisted in swallowing their tongue, by which it is said they voluntarily terminated their own existence. Several more modern authors have noticed this incredible mode of suicide, as one that is resorted to by negroes: now to confute such an idea, we have only to shew the attachment of the muscles of this part, and the motions which they permit; equally absurd is it to suppose with other physiologists, that persons can occasion suffocation by a voluntary suspension of their breathing; for if such an attempt were even made, the effort would be ended when self-possession was once lost, for then the impulse of nature must instantly triumph over any struggle to oppose it. We are not, however, prepared to say that such an attempt might not, in certain cases, occasion such a cerebral congestion as to produce apoplexy.
The last cause of suffocation which we have to mention is mechanical obstruction, from the entrance of foreign bodies into the aperture of the glottis; instances of this kind are too numerous and familiar to require many observations: it is thus that Anacreon is said to have perished from a grape-seed; Gilbert, the poet, terminated his existence in a similar manner; he was a man of great appetite, and in the midst of a festival went into a neighbouring room, but did not return to the great surprise of his convivial companions. He was found stretched on a couch without any signs of life. The assistance administered by his kind but uninformed friends was useless; on opening the body a small piece of mutton was found, that had stopped at the entrance of the larynx, and completely prevented the passage of air into this organ. In Oct. 1821, two inquisitions were taken at Mildenhall, before the Coroner of Bury St. Edmonds in Suffolk; in the one case it appeared that John Harris had eaten some honey, from the honey-comb, and that a bee, having been concealed in it, entered the glottis, and occasioned almost immediate death by suffocation; the other case was that of an infant, Mary Bacon, who fell with her face upon a quantity of slacked lime, when a particle of it getting into the wind-pipe, produced inflammation of the lungs, and sloughing of the trachea, of which she died. We have no doubt but that persons, during the state of intoxication, or that of a spasmodic paroxysm, have often perished from suffocation, when the death has been attributed to other causes; if the stomach should reject its contents during a state of insensibility[[51]], such an occurrence is by no means unlikely. We have lately received the history of a case of this description, which occurred in the St. James’s workhouse, and fell under the particular notice of Mr. Alcock. The patient was seized after a hearty meal of pork with an epileptic fit, during which he died; when upon opening the trachea, it was found to contain a quantity of animal matter resembling the pork upon which he had recently dined.
8. DEATH BY EXPOSURE TO COLD.
That an animal must perish as soon as the temperature of the medium in which it lives ceases to preserve the blood in a state of fluidity, is one of those self-evident propositions which scarcely requires notice, much less explanation; but that a degree of cold not sufficiently intense to occasion any physical changes upon the constituent parts of the body should extinguish its vitality is a fact, whose history involves some of the most interesting questions of physiology.
The degree of cold, necessary for the production of its fatal effects, varies in a very remarkable degree with the strength and circumstances of the individual to whom it is applied, as well as with the rapidity of the cooling process. In some instances we find that man has endured an extreme degree of cold with but little inconvenience, whilst in other cases, we see him perishing from it in a temperature at which water even retains its fluidity. The interesting history of Sir Joseph Bankes (at that time Mr. Bankes), Dr. Solander, and eleven others, on a botanical excursion to the mountains of Terra del Fuego; and more recently, the narrative of our enterprizing countrymen, in their voyage to the Polar seas, will furnish a good illustration of the former fact, whilst the melancholy fate of the Cambridge student, as hereafter explained, affords a curious and instructive example of the latter. Animal heat, as Mr. Brodie observes, is in some way or other dependant upon the integrity of the functions of the Nervous System; and consequently the absolute degree of cold which an animal can bear with impunity will, cæteris paribus, be determined by his powers of producing heat; we must therefore cease to regard the fact as extraordinary, that an animal, which is under the influence of a deleterious narcotic poison, or in whom, from any other morbid cause, the powers of the nervous system are exhausted, may be destroyed by a diminished temperature, that would scarcely affect even the sensations of one, differently placed in relation to his nervous energy; thus it is with a person in the last stage of intoxication, in whom the powers of life are ebbing, in consequence of the previous state of morbid excitement; in the course of the last winter, two instances occurred of drunken persons being taken to the watch-house; where, there not being any charge against them, they were dismissed by the constable of the night, and perished in the streets. A military friend has lately communicated to us an instance, where out of a great number of troops who were exposed to intense cold, the only one who perished was under the influence of intoxication; and we learn from Le Baume’s interesting account of the campaign in Russia, that similar results were observed during the disastrous retreat of the French army on that memorable occasion.
In our own country scarcely a winter passes without the occurrence of some event equally illustrative of this physiological fact; and it is highly important that the medical jurist should be able to appreciate its influence; those who perish in this manner are generally individuals of the most wretched condition, and will be found to have undergone much suffering and privation; by which their nervous energy had been too much exhausted to generate sufficient heat to counteract the diminished temperature of the atmosphere; an event of this nature occurred in London during the winter of 1819, when a man and his wife, aged persons, and poor, but not supposed, nor indeed proved to have been quite destitute, were found dead in their apartment, although food was discovered in the room, and money was in the pocket of the man: the night (28th of December) had been inclement, and there was neither bed nor fire in the miserable couple’s apartment. It appeared in evidence that they had been previously ailing. The verdict recorded that they had perished from the inclemency of the weather, in consequence of the destitute circumstances under which they were found.
It would seem that persons who are long exposed to intense cold do not suffer a painful death; they gradually lose their sensibility, become drowsy, and die as if through the effects of an opiate. Mr. Brodie[[52]] classes the effects of cold in the following order.
1. It lessens the irritability, and impairs the functions of the whole nervous system.
2. It impairs the contractile powers of the muscles.