"All contagious diseases take their own channels of ingress into the human system, for instance, cholera, typhoid fever and dysentery through the digestive organ only, the bubonic plague through the wounds, abrasions and such like and the pneumoaic plagi through the respiratory organ. instances of Phtbisis, which is a mild form of conta; ions disease, the disaas may get into the lange through the respiratory organ to cause consumption into the intestines through the dig. organ to cease tabercle of the intestines and thronga openings in the skin to "The bubonic plague itself may, at the last stage of its death-d ling work in the human bbs lowest, cause sometimes a complication of the pnoamonic and intestinal This tracing of the respective chesnels of ingress is a matter of primary importance, for, without their accurate knowledge, all' prevention work would be merely throwing away money and Inbour, jast like the waste of ballets and lls on an enemy whose whereabouts wrapped op in the pitch of darkness,
Text read from the printed page and cleaned; old type leaves the occasional error.