▁the ▁first ▁points ▁to ▁be ▁de alt ▁with ▁in ▁ 1 8 9 7 ▁was ▁to ▁sett le ▁the ▁inc ub ation ▁period ▁for ▁this ▁disease , ▁and ▁the ▁period ▁to ▁be ▁adopted ▁for ▁administrative ▁purposes . ▁It ▁was ▁admitted ▁that ▁the ▁inc ub ation ▁period ▁was , ▁as ▁a ▁rule , ▁a ▁compar atively ▁short ▁one , ▁namely , ▁of ▁some ▁three ▁or ▁four ▁days . ▁After ▁much ▁discussion ▁ten ▁days ▁was ▁accepted ▁by ▁a ▁very ▁large ▁majority . ▁The ▁principle ▁of ▁disease ▁notification ▁was ▁un anim ously ▁adopted . ▁Each ▁government ▁had ▁to ▁notify ▁to ▁other ▁govern ments ▁on ▁the ▁existence ▁of ▁pl ague ▁within ▁their ▁several ▁juris dict ions , ▁and ▁at ▁the ▁same ▁time ▁state ▁the ▁measures ▁of ▁prevent ion ▁which ▁are ▁being ▁carried ▁out ▁to ▁prevent ▁its ▁diffusion . ▁The ▁area ▁de emed ▁to ▁be ▁inf ected ▁was ▁limited ▁to ▁the ▁actual ▁district ▁or ▁village ▁where ▁the ▁disease ▁pre va iled , ▁and ▁no ▁local ity ▁was ▁de emed ▁to ▁be ▁inf ected ▁merely ▁because ▁of ▁the ▁import ation ▁into ▁it ▁of ▁a ▁few ▁cases ▁of ▁pl ague ▁while ▁there ▁has ▁been ▁no ▁diffusion ▁of ▁the ▁mal ady . ▁As ▁regards ▁the ▁pre ca utions ▁to ▁be ▁taken ▁on ▁land ▁front iers , ▁it ▁was ▁decided ▁that ▁during ▁the ▁pre val ence ▁of ▁pl ague ▁every ▁country ▁had ▁the ▁inher ent ▁right ▁to ▁close ▁its ▁land ▁front iers ▁against ▁traffic . ▁As ▁regards ▁the ▁Red ▁Sea , ▁it ▁was ▁decided ▁after ▁discussion ▁that ▁a ▁health y ▁vessel ▁could