. Popular electricity magazine in plain English. willseek their natural field in street light-ing, stores, halls, etc. CANARY BIRDS CARRIED BYMINE RESCUERS When a big mine explosion is re-ported to the government, Uncle Samdispatches one of his Mine Rescue Carsto the scene. This car is fitted up withall kinds of life saving apparatus of usein rescuing entombed miners far belowthe earths surface. There are carbidesafety lamps, oxygen helmets and oxy-gen making machines, portable tele-phones which the men take into themines depths to establish communica-tion with those at the surface, chestsof i
. Popular electricity magazine in plain English. willseek their natural field in street light-ing, stores, halls, etc. CANARY BIRDS CARRIED BYMINE RESCUERS When a big mine explosion is re-ported to the government, Uncle Samdispatches one of his Mine Rescue Carsto the scene. This car is fitted up withall kinds of life saving apparatus of usein rescuing entombed miners far belowthe earths surface. There are carbidesafety lamps, oxygen helmets and oxy-gen making machines, portable tele-phones which the men take into themines depths to establish communica-tion with those at the surface, chestsof instruments for testing gases, etc.,but over in one corner of the car there Popular Electricity and the Worlds Advance 1365 are dozens of canary birds in cages,warbling away the time in such strangesurroundings. The first impression onentering the car is, What! canarybirds here? These men who are giv-ing every thought to saving the lives ofthe unfortunates buried in the minesdepths can have no time to listen tocanary birds sing. But those little. The Canary Birds, if Taken into a Mine,Act as Barometers canary birds are there to save the livesof those rescue men who risk their livesin order to save others by penetratinginto the dangerous gas laden depths ofa mine after an explosion has oc-curred. It has just been proven to the satis-faction of the governments experts that the lungs of these little warblersare very susceptible to the dangerousatmospheres which gather in the depthsof a mine where an explosion has oc-curred. The canary birds if taken into themine, act as barometers to the presence ofthe dangerous gases in the atmospherebefore they can be detected by instru-ments on the human being. As longas the birds hop about in the cage, theatmosphere is satisfactory, but as soonas they display signs of drowsiness anddroop their wings, it is a sure sign ofdangerous gases not far ahead and onlythose equipped with oxygen helmetsand oxygen making machines may ven-ture farther with s
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1912
