The National Geographic Magazine, Volume 104National Geographic Society, 1953 - Geography Indexes kept up to date with supplements. |
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Page 157
... told us about the work he and other scientists are doing to bring it under control . One weakness of some species of tsetse fly , he explained , is that they must have shade . They breed and live in thick undergrowth . Back in the ...
... told us about the work he and other scientists are doing to bring it under control . One weakness of some species of tsetse fly , he explained , is that they must have shade . They breed and live in thick undergrowth . Back in the ...
Page 213
... told me . In canaigre's thick knobby roots , which look like gnarled sweet potatoes , a rich source of tannin has been found . To enable farmers in dry regions to grow canaigre , high - yielding plants are being se- lected from the wild ...
... told me . In canaigre's thick knobby roots , which look like gnarled sweet potatoes , a rich source of tannin has been found . To enable farmers in dry regions to grow canaigre , high - yielding plants are being se- lected from the wild ...
Page 404
... told me that the fires affected navigation . By destroying vegeta- tion they lessen the soil's water - holding prop- erties and cut down the volume of flow in the Yukon , which is less than that of some other rivers its length . Now ...
... told me that the fires affected navigation . By destroying vegeta- tion they lessen the soil's water - holding prop- erties and cut down the volume of flow in the Yukon , which is less than that of some other rivers its length . Now ...
Contents
Fact Finding for Tomorrows Planes A Little Faninabox Wind | v |
All America Mingles in the Prairie State | ix |
Rip Van Winkle of the Underground North Americas Much Misunder | xii |
Copyright | |
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