It is called _bubonic_--from the Greek _boubon_ ("groin")--because it attacks the lymphatic glands of the groins, armpits, neck, and other parts of the body. Among its leading symptoms are headache, fever, vertigo, vomiting, prostration, etc., with dark purple spots or a mottled appearance upon the skin. Death in severe cases usually occurs within forty-eight hours. Bacteriologists are now generally agreed that the disorder is due to a bacillus identified by investigators both in India and in western countries. The first historic appearance of the black death in Europe was at Constantinople, A.D. 543. But far more widespread and terrible were its ravages in the fourteenth century, when they were almost world-wide. Of the dreadful visitation in Europe then, we are fortunate to have the striking account of Dr. Hecker, which follows. The name "black death" was given to the disease in the more northern parts of Europe--from the dark spots on the skin above mentioned--while in Italy it was called _la mortalega grande_ ("the great mortality"). From Italy came almost the only credible accounts of the manner of living, and of the ruin caused among the people in their more private life, during the pestilence; and the subjoined account of what was seen in Florence is of special interest as being from no less an eye-witness than Boccaccio. J. F. C. HECKER The nature of the first plague in China is unknown. We have no certain intelligence of the disease until it entered the western countries of Asia. Here it showed itself as the oriental plague with inflammation of the lungs; in which form it probably also may have begun in China--that is to say, as a malady which spreads, more than any other, by contagion; a contagion that in ordinary pestilences requires immediate contact, and only under unfavorable circumstances of rare occurrence is communicated by the mere approach to the sick.