The National Geographic Magazine, Volume 110National Geographic Society, 1956 - Geography Indexes kept up to date with supplements. |
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Page 318
... wood ' - sawdust , bark , and wood that can't be made into salable products to generate steam and electricity , " said Irvin Luiten , who was showing me around . " But we're fast reaching the point here and at some of our other mills ...
... wood ' - sawdust , bark , and wood that can't be made into salable products to generate steam and electricity , " said Irvin Luiten , who was showing me around . " But we're fast reaching the point here and at some of our other mills ...
Page 560
... wood , it grows rapidly and soon makes a burrow about the width of a pencil or wider , accord- ing to the species . But in each case the entrance remains no larger than is necessary for the siphons to project . Thus a boat's planks may ...
... wood , it grows rapidly and soon makes a burrow about the width of a pencil or wider , accord- ing to the species . But in each case the entrance remains no larger than is necessary for the siphons to project . Thus a boat's planks may ...
Page 566
... wood at the wide end was at- tacked . A calculation showed that the borers cannot enter wood unless the current of water passing it is flowing at less than about 11⁄2 knots . Dr. Lane has confirmed the knowledge that shipworms digest ...
... wood at the wide end was at- tacked . A calculation showed that the borers cannot enter wood unless the current of water passing it is flowing at less than about 11⁄2 knots . Dr. Lane has confirmed the knowledge that shipworms digest ...
Contents
PAGE | v |
Into the Heart of Africa The Weeks Expedition Collecting Birds | xviii |
Zoo Animals Go to School By Marion P McCrane 694 | xxiv |
Copyright | |
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