The commencement of the disease is often so insidious as to pass unnoticed till the system is fully prepared for the sudden and violent attack. The slight, painless diarrhoea, depression of the nervous power, and occasional vertigo may all pass unheeded, and the patient be apparently in perfect health. He may retire to rest entirely unconscious of approaching danger, and after enjoying a sound and undisturbed sleep for hours, be, on awakening from his slumbers, seized with a remarkable sickness, perhaps vomiting, accompanied with most remarkable and profuse discharges from the bowels. These inordinate evacuations are usually attended with severe pains, extending down the thighs, and a sense of complete and almost perfect exhaustion. The physical powers and vital energies are immediately prostrated. The temperature rapidly sinks below the normal standard--the body becomes benumbed with an icy coldness--the skin becomes shriveled up, and almost insensible to hot and stimulating fomentations--the breath, too, as it comes from the lungs, appears to partake of the same icy coldness, indicating the rapid elimination of heat, or caloric, from the body. The patient complains of being greatly oppressed, throws off his clothing--calls for cold water, which he eagerly and copiously drinks; though it afford no relief to his insatiate thirst, it ought not to be withheld. This peculiar icy coldness and loss of temperature is also further shown by the livid, blue, or purple appearance of the hands and feet, extending sometimes over the greater part of the body. The skin becomes, even in a few minutes after the seizure, not only shriveled up, but often curiously wrinkled, as in extreme old age. Severe spasms in the fingers, toes, legs, and abdomen, cause the patient to groan and writhe under their influence, and to call on his attendants, if fortunate enough to have any around him, for aid and relief from his agonies. As the disease proceeds, there may be noticed a peculiar, sharp and contracted state of the features, and a wild and terrified expression of the countenance, arising from the impression and fearful apprehension of rapidly approaching dissolution. These important changes may all take place in a very few minutes. To these most obvious and singular symptoms there is superadded constant vomiting--incessant purging--low, feeble pulse, though occasionally natural and sometimes rapid, yet in some instances, from the very first moment of attack, cannot be discovered either in the large superficial arteries or at the wrist. The voice is altered, becomes low, feeble, unnatural in tone, or sinks even to a whisper. Respiration becomes quick, irregular, laborious and imperfect. The inspiratory act being performed with difficulty, and expiration being quick and convulsive. The flow of bile into the intestines is suspended, the urinary secretion and micturition entirely suppressed. Almost the only organ which seems to preserve in any good degree its powers is