Show americas rat population the board bill for american rats Is about annually dr urd ard 11 II arc creel ho has earned arned big lau reis as an all expert expect lu figures es estimates ti mateli i the alie rate population as equal dedual to the hu nan population D kut ut unless proper preventive measures are token taken speed lly the batsin rats in the country will make a charge archarge on our resources far in excess of the present figure As rapid breed ers rats leave the guinea pigs far in ili the rear from ten to eighteen raise rats arrive in ili a litter litters are bimonthly events in rat nests and the young soung rats be begin ginto to multiply when they are from three to six months old rats rata have become become a real national menace boston globe |