National Geographic : 1946 May
© National Geographic Society ooaacnrome uy iuaniei o.Turner Morrissey Makes the First Hydrographic Survey of Frobisher Bay Since It Was Discovered inElizabethan Times The fathometer, an echo-sending, depth-measuring device, leads from rail to water. One man uses lead and line as a check against double echo from apinnacle-rock bot tom. Here Sir Martin Frobisher, questing for a Northwest Passage, sought a "backe syde" to the Pacific. He found instead a"black earth" which created agold craze.