The National Geographic Magazine, Volume 81National Geographic Society, 1942 - Geography Indexes kept up to date with supplements. |
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Page 457
This Is a War of Many Metals , for We Live in an Age of Alloys BY FREDERICK G. VOSBURGH She Inspects the Tiny Tungsten Wire That Glows in Bulbs. A T THE Army's busy Bolling Field at Washington the other day I watched 14 tons of metal ...
This Is a War of Many Metals , for We Live in an Age of Alloys BY FREDERICK G. VOSBURGH She Inspects the Tiny Tungsten Wire That Glows in Bulbs. A T THE Army's busy Bolling Field at Washington the other day I watched 14 tons of metal ...
Page 459
... Metals Will Float Asked to name all the known metals in the world , few of us could give more than twenty . Yet the total list is more than three times that long - some seventy kinds of metal . Of these about thirty are useful today ...
... Metals Will Float Asked to name all the known metals in the world , few of us could give more than twenty . Yet the total list is more than three times that long - some seventy kinds of metal . Of these about thirty are useful today ...
Page 463
... metal rolls right off . In this airplane factory the liquid alloy is poured into a stoppered length of tubing , which is then cooled with water . The metal solidifies and keeps the tube from collapsing during bend- ing . It also shows ...
... metal rolls right off . In this airplane factory the liquid alloy is poured into a stoppered length of tubing , which is then cooled with water . The metal solidifies and keeps the tube from collapsing during bend- ing . It also shows ...
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Africa ALEXANDER WETMORE aluminum American animals Anthony Stewart Anticosti Anzac Army Australia Bapa Bapa's beryllium Bhavnagar birds boat British buildings built California camp Canal carried coast colonial color Company Dakar early eeee falcon feet fish France Frances Lake French Geographic Society Kodachrome giant gold Gt.Br Guinea guns harbor hawk Honduras houses huge Hwang Ho Indian Indies Irving Johnson island Japanese kaoliang Lake land live look Luis Marden Madagascar Maynard Owen Williams meat Menier metal miles mountain NATIONAL GEOGRAPHIC MAGAZINE National Geographic Society native naval Navy night North Ocean officers Pacific percent Philippines Pitcairn planes plants Plate Ponape Port pounds Reef River road sail Saipan San Diego ship soldiers South Staff Photographer steel tion town trees United Washington West Yellow River York Zealand