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Page 102
... produce the metals ? Suppose , for instance , we want to get a ton of aluminum . The " recipe " would be : " Take ten tons of anorthosite . Melt in a solar furnace at 3200 ° . Add water and quench the melt to give a glassy solid . Allow ...
... produce the metals ? Suppose , for instance , we want to get a ton of aluminum . The " recipe " would be : " Take ten tons of anorthosite . Melt in a solar furnace at 3200 ° . Add water and quench the melt to give a glassy solid . Allow ...
Page 127
... producing ruminants are the cow and the goat . Cows weigh ten times as much as goats and eat ten times as much feed . But a cow will produce only four times as much milk as a goat . For a given amount of feed , a goat will produce more ...
... producing ruminants are the cow and the goat . Cows weigh ten times as much as goats and eat ten times as much feed . But a cow will produce only four times as much milk as a goat . For a given amount of feed , a goat will produce more ...
Page 183
... producing iron ( though it is replaceable by electrolytic hydrogen ) and electricity - mostly fossil - fuel generated — is needed to produce aluminum . Energy is also needed to smelt other metals or to produce substitutes for materials ...
... producing iron ( though it is replaceable by electrolytic hydrogen ) and electricity - mostly fossil - fuel generated — is needed to produce aluminum . Energy is also needed to smelt other metals or to produce substitutes for materials ...
Contents
CONTENTS Acknowledgments | 8 |
Introduction by Ray Bradbury | 9 |
Other Life in Space | 11 |
Copyright | |
17 other sections not shown
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Colonies in Space: A Comprehensive and Factual Account of the Prospects for ... T. A. Heppenheimer No preview available - 2017 |
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