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Show SIXTH 8ENQE IN BIRDS. Experiments .vlth carrier Pigeons Prove .t F ..".session. Although birds aro not placed near the summit lino ot evolution, thol.' ability to fly gives them advantages over nearly all the mammalia. Their mysterious power of changing their polisrlty or weight, In order to dive In water or fly, has been often dls-cussod, dls-cussod, and tho almost Incredlblo velocity ve-locity of their motion when migrating, sometimes amounting to four miles a mlnuto for vast distances, has no parallel par-allel among other animals. A sorles of careful trials with carrier car-rier pigeons shows apparently without doubt their possession of a highly developed de-veloped senso of direction. In twenty minutes tho first bird, dispatched nt 10 p. m reached Its roost, n distance ot seventeen miles being traversed. Half of tho number arrived bofore midnight and tho romnlndor followed In a few hours. |