The National Geographic Magazine, Volume 115National Geographic Society, 1959 - Geography Indexes kept up to date with supplements. |
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Page 309
... rock so hard a foreman said of it : " This stuff takes the teeth off a power shovel every 18 hours . Ten feet of it will blunt a drill bit . " At the upper lock there were 3,000,000 tons of such rock to remove . Dynamite would do it ...
... rock so hard a foreman said of it : " This stuff takes the teeth off a power shovel every 18 hours . Ten feet of it will blunt a drill bit . " At the upper lock there were 3,000,000 tons of such rock to remove . Dynamite would do it ...
Page 11
... Rock , Father Albert 503 Rock , Volcanic : Madeira ( is- land ) 378 , 387 Rock crystal , Cylinder of : Cenote Xlacah 125 , 129 Rock Harbor , Isle Royale , Mich . 451 Rocket - launching area see Canaveral , Cape Rockets : " Reaching for ...
... Rock , Father Albert 503 Rock , Volcanic : Madeira ( is- land ) 378 , 387 Rock crystal , Cylinder of : Cenote Xlacah 125 , 129 Rock Harbor , Isle Royale , Mich . 451 Rocket - launching area see Canaveral , Cape Rockets : " Reaching for ...
Page 11
... Rock , Father Albert 503 Rock , Volcanic : Madeira ( is- land ) 378 , 387 Rock crystal , Cylinder of : Cenote Xlacah 125 , 129 Rock Harbor , Isle Royale , Mich . 451 Rocket - launching area see Canaveral , Cape Rockets : " Reaching for ...
... Rock , Father Albert 503 Rock , Volcanic : Madeira ( is- land ) 378 , 387 Rock crystal , Cylinder of : Cenote Xlacah 125 , 129 Rock Harbor , Isle Royale , Mich . 451 Rocket - launching area see Canaveral , Cape Rockets : " Reaching for ...
Contents
VOLUME CXV | 155 |
TenColor Map Lands of the Eastern MediterraneanNIA | iii |
PUBLISHED BY | i |
Copyright | |
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