The National Geographic Magazine, Volume 103National Geographic Society, 1953 - Geography Indexes kept up to date with supplements. |
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Page 22
... trains are pushed up a ramp and the cars uncoupled . As each car coasts down the other side , the sorter operates switches and track brakes from his control tower to assemble a new train . The ice plant in Potomac Yard can make 550 tons ...
... trains are pushed up a ramp and the cars uncoupled . As each car coasts down the other side , the sorter operates switches and track brakes from his control tower to assemble a new train . The ice plant in Potomac Yard can make 550 tons ...
Page 107
... train would then de- scend . It took two or three hours to inflate the 6 to 12 balloons . The amount of gas in each had to be adjusted with great care so that the train would rise rapidly to 40 or 50 thousand feet , where two balloons ...
... train would then de- scend . It took two or three hours to inflate the 6 to 12 balloons . The amount of gas in each had to be adjusted with great care so that the train would rise rapidly to 40 or 50 thousand feet , where two balloons ...
Page 109
... trains that had returned to earth in the impenetrable muskeg . Rays Discovered by Accident As I watched our balloon ... train was still moving through forest , but by morn- ing we were in the " land of little sticks , " where the woods ...
... trains that had returned to earth in the impenetrable muskeg . Rays Discovered by Accident As I watched our balloon ... train was still moving through forest , but by morn- ing we were in the " land of little sticks , " where the woods ...
Contents
Founders of New England Centuries after the Pilgrims and Puritans | 6 |
Following the Trail of Lewis and Clark In a Station Wagon | 8 |
Report from the Locust Wars From Africa to India Men Fight an Ancient | 11 |
Copyright | |
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