Show waltzing mice help in work of mine the rescue squads of the mining als tracts are often compelled to enter mines where the air is likely to be charged with gas that would make it impossible for human life but the presence of this gis Is not to the nose in order to protect then belies it has been the custom for these men to carry a canary bird along with surgical supplies foods tools and oxygen apparatus because the bird Is quickly affected by even a small of gas and invariably warned the rescue workers of the fatal and in visible fumes in the future however japanese waltzing 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 are in addition to this the mice are hirdler and are not often fatally by their experience whereas the birds are usually they do not recover from the effect of the gas |