3. In _the acute type_, the plague is preceded by a much shorter indisposition, sometimes by none at all, suddenly seizing persons in health. It is characterized by the following symptoms: a bitter taste in the mouth, and a viscidity of the saliva; violent head-ach[46]; redness of the eyes[47] and face; a very foul, and sometimes dry tongue; chilliness succeeded by considerable heat; a much fuller, stronger, and quicker pulse than in the slow type of the disorder, as well as more thirst, and deeper coloured urine; costiveness; buboes, and carbuncles come out soon after the attack of fever, or at the same time with it; after these, others come out; frequent vomitings supervene, and a delirium, which is generally of the low kind[48]. If, between the first and fourth day of the attack, the buboes are resolved[49], or they, as well as the carbuncles, come to suppuration, the patient recovers: on the other hand, if no suppuration takes place within that period; if the buboes and carbuncles increase to a great size, and the delirium continues, then the powers of life become exhausted, the pulse sinks, and death is ushered in by hæmorrhages, and a copious exspuition of thin phlegm[50]. Death takes place on the third, fourth, or fifth day; and it often happens, while the corpse is yet warm, that petechiæ and other spots come out. The bodies, after death, appear remarkably pale, soft, somewhat tumid, flexible, and free from fætor. 4. The plague, _in its most acute type_, attacks in various ways; but in relation to the leading symptoms, it may be reduced to two forms: in the first, a person in perfect health, without any previous marks of infection, is suddenly seized with a short but violent shivering fit, followed by a hot fit, which alternate with each other several times; but the external heat soon goes off, and the skin feels cool. The pulse is hard and very quick, with a most violent headach and intolerable anxiety about the præcordia[51]; a furious delirium generally comes on; the tongue is smooth, exceedingly dry, and after a while becomes livid; the respiration is short and laborious; the eyes, which are more prominent than in the acute plague, are very red and full of ferocity; the face and neck are turgid, at first red and afterwards livid; vomiting seldom comes on spontaneously. Such as are seized with these violent symptoms seldom live more that twenty-four hours. Most of them die apoplectic, or in a state of convulsive suffocation[52]; some, however, expire in a more placid manner. After death the bodies turn livid in those parts where nature had endeavoured to throw out buboes; and dark-coloured spots and vibices appear in different places. In the other mode of attack, the patients are affected with debility from the beginning, which, together with the anxietas præcordiorum, increases every moment; so that unless timely relief be given, death speedily comes on. In these cases, the pulse is very quick, but small, feeble,