Each has a name of his own—the one, Chang, and the other, Eng; but, when persons wish to address them as one—to claim their attention to anything, for example, or to call them—they are addressed as—Chang Eng.

The union of twins is not an unusual occurrence, and various anatomical collections present many such objects. Ambrose Paré relates several instances. Dr. Warren is, however, of opinion, that the Siamese Boys present the most remarkable case of the lusus naturae which has yet been known, taking into view the perfection and distinctness of organization, and the length of time they have lived. The whole phenomenon may be described in a very few words—two perfect bodies united and bound together by an inseparable link. As we have already stated, their health is at present good; but, observes Dr. Warren, "it is probable that the change of their simple living for the luxuries they now obtain, together with the confinement their situation necessarily involves, will bring their lives to a close within a few years." We hope that such will not be the result of their leaving their native shores; and we are much pleased with this passage in a letter from Drs. Samuel Mitchill and Anderson to Capt. Coffin—"They (the youths) are under the protection of a kind and benevolent gentleman, and we know you will take good care of them, and if they live, return them to their homes again." Of their strength many instances are related: since they have arrived in London they have lifted a gentleman of considerable weight, with great ease; and on this point Drs. Mitchill and Anderson say—"As they are so vigorous and alert, we readily coincide that in ten seconds they can lay a stout ordinary man on his back."

We shall not go out of our way to state half the curious questions which forcibly arose in our minds on visiting this interesting exhibition. One of the most important, and least easy of solution, is the structure of the connecting band—how it is kept alive—whether blood flows into and circulates through it from each, and passes into the system of the other—whether it be composed of bone, as well as of cartilage—and whether it could be safely divided? Upon examining the connexion, or cord, Dr. Warren says—"Placing my hand on this substance, I found it extremely hard. On further examination, the hardness was found to exist at the upper part of the cord only, and to be prolonged into the breast of each boy. Tracing it upwards, I found it to be constituted by a prolongation of the ensiform cartilage of the sternum, or extremity of the breast-bone. The cartilages proceeding from each sternum meet at an angle, and then seem to be connected by a ligament, so as to form a joint. This joint has a motion upwards and downwards, and also a lateral motion—the latter operating in such a way, that when the boys turn in either direction, the edges of the cartilage are found to open and shut.

"Besides this there is nothing remarkable felt in the connecting substance. I could distinguish no pulsating vessel. The whole of this cord is covered by the skin. It is remarkably strong, and has no great sensibility, for they allow themselves to be pulled by a rope fastened to it, without exhibiting uneasiness. On ship board, one of them sometimes climbed on the capstan of the vessel, the other following as well as he could, without complaining. When I first saw the boys, I expected to see them pull on this cord in different directions, as their attention was attracted by different objects. I soon perceived that this did not happen. The slightest impulse of one to move in any direction is immediately followed by the other; so that they appear to be influenced by the same wish."

This harmony in their movements, Dr. Warren thinks, is a habit formed by necessity. His further account of their habits is extremely curious:

"They always face in one direction, standing nearly side by side, and are not able, without inconvenience, to face in the opposite direction—so that one is always at the right, and the other at the left. Although not placed exactly in a parallel line, they are able to run and leap with surprising activity. On some occasions a gentleman, in sport, pursued them round the ship, when they came suddenly to the hatchway, which had been inadvertently left open. The least check would have thrown them down the hatchway, and probably killed one, or both, but they leaped over it without difficulty. They differ in intellectual vigour; the perceptions of one are more acute than those of the other, and there is a corresponding coincidence in moral qualities. He who appears most intelligent is somewhat irritable in temper, while the other's disposition is mild."

The connexion between these boys might present an opportunity for some interesting observations in regard to physiology and pathology. There is, no doubt, a network of blood-vessels and some minute nerves passing from one to the other. How far these parts are capable of transmitting the action of medicines, and of diseases, and especially what medicines and diseases, are points well worthy of consideration. Dr. W. thinks that any indisposition of one extends to the other; that they are inclined to sleep at the same time; eat about the same quantity, and perform other acts with great similarity. Both he and Mr. Hunter are of opinion that touching one of them when they are asleep, awakens both. When they are awake, an impulse given to one does not in the least affect the other. There is evidently no impression received by him who is not touched. But the opinion just mentioned is undoubtedly erroneous. The slightest movement of one is so speedily perceived by the other, as to deceive those who have not observed closely. There is no part of them which has a common perception, excepting the middle of the connecting cord, and a space near it. When a pointed instrument is applied precisely to the middle of the cord, it is felt by both, and also for about an inch on each side; beyond which the impression is limited to the individual of the side touched.

"In the function of the circulation there is a remarkable uniformity in the two bodies. The pulsations of the hearts of both coincide exactly under ordinary circumstances. I counted seventy-three pulsations in a minute while they were sitting—counting first in one boy and then in the other; I then placed my fingers on an arm of each boy, and found the pulsations take place exactly together. One of them stooping suddenly to look at my watch, his pulse became much quicker than that of the other; but after he had returned to his former posture, in about a quarter of a minute his pulse was precisely like that of the other; this happened repeatedly. Their respirations are, of consequence, exactly simultaneous."

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The Mirror of Literature, Amusement, and Instruction. Volume 14, No. 401, November 28, 1829

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