IV.* WORK OF THE NATIONAL BOARD OF PUBLIC HEALTH OF THE REPUBLIC OF BRAZIL.
Since the country was invaded by Europeans nearly four hundred years ago, many hard battles have been fought on the soil of Brazil for possession, power and personal gain and influence. In many of these wars, Justice was blindfolded and victories were won by superior intelligence and greater effectiveness of arms, regardless of the causes which led to strife and bloodshed. The greatest and most honorable warfare in which Brazil ever engaged, however, is now being waged, and victory after victory has crowned her fighting forces, armed not with implements of war, but with the silent arms of science, which have destroyed the most formidable foe of the country, the death-dealing microbes of the most dangerous acute transmissible diseases—yellow fever and bubonic plague. What Colonel Gorgas has accomplished in the Canal Zone and the cities of