Show waltzing ing mie mice help m in work of mine rescues the rescue squads of the the mining districts are often compelled to enter mines where the air Is likely to be charged with gas that would mates make it impossible for etiman life but tho the presence of this gas Is not apparent to the nose in order to protect themselves it has been the custom tor for these men to carry a canary bird along alone with surgical supplies foods tools and oxygen apparatus because the bird Is quickly affected by even a small amount of gas gaa and invariably warned the rescue workers of the fatal and invisible fumes in the future however japanese waltzing rolce mice will replace the little yellow songsters song because experiments have shown that the curiously behaving rodents from the orient are much more sensitive to deadly gas than canaries arc am in addition to this the mice are hardler and are not often fi fatally L tally s stricken by their exper lenef whereas the birds are usually sacrificed they do not recover from the effect of the gas |