Popular science monthly . This can will trap everyinquisitive animal thatsticks its head into it Trapping Animals byCanning Them AFI\T£-gallon gasoline can. cut at the top fromcorner to corner and withthe sharp edges bent inward,constitutes a trap foranimalsthat never fails to the animal enters thecan with its heat! the sharpedges pre\ent it from ex-tracting it and escaping. Charting the Dangers of the Deep. «k! Disentangling and measuring the depth of the submerged wire-dragafter it has struck an uncharted rock. With the lead Une thediscovery of this rock would have been more or les
Popular science monthly . This can will trap everyinquisitive animal thatsticks its head into it Trapping Animals byCanning Them AFI\T£-gallon gasoline can. cut at the top fromcorner to corner and withthe sharp edges bent inward,constitutes a trap foranimalsthat never fails to the animal enters thecan with its heat! the sharpedges pre\ent it from ex-tracting it and escaping. Charting the Dangers of the Deep. «k! Disentangling and measuring the depth of the submerged wire-dragafter it has struck an uncharted rock. With the lead Une thediscovery of this rock would have been more or less a left, the buoy or float with the upright and weight attached L AST summera submergedrock wasfound at the en-trance to Bostonharbor, close towhich one ormore of our ten-miUion-d o 1 1 a rsuper-d re ad -noughts hadrepeatedly passed under the suppo-sition that the water was forty-fivefeet deep, whereas it was actually onlytwent>--three feet deep. Before that arocky pinnacle was discovered in Alaskawaters, higher than the Washingtonmonument, lying directly in the steam-ship lane. Only seventeen feet of watercovered it. These are striking examplesof the valuable service rendered theworlds shipping interests by the UnitedStates Coast and (.eodetic Survey. No one branch of the a more important part in the wel-fare of the coimtry than the CoastSurvey. It is not only the oldest scien-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
