The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة xii
... VII . MAN AND HIS MACHINES 178 The Development of Culture 178 Early Discoveries 179 Early Metals 179 Later Metals 180 Limited Supply of Metals 181 • CHAPTER PAGE Culture and Invention The Metals Iron Supply Iron xii CONTENTS.
... VII . MAN AND HIS MACHINES 178 The Development of Culture 178 Early Discoveries 179 Early Metals 179 Later Metals 180 Limited Supply of Metals 181 • CHAPTER PAGE Culture and Invention The Metals Iron Supply Iron xii CONTENTS.
الصفحة xiii
Carl Kelsey. CHAPTER PAGE Culture and Invention The Metals Iron Supply Iron Alloys Steel Iron Production Copper Zinc Aluminum Tin Lead 182 183 183 184 185 185 186 187 187 187 188 Noble Metals 188 Other Elements of the Machine Age Fire ...
Carl Kelsey. CHAPTER PAGE Culture and Invention The Metals Iron Supply Iron Alloys Steel Iron Production Copper Zinc Aluminum Tin Lead 182 183 183 184 185 185 186 187 187 187 188 Noble Metals 188 Other Elements of the Machine Age Fire ...
الصفحة 7
... iron , copper , and calcium . The metal- lic stars , including the sun , Arcturus , and Aldebaran , dis- play the common metals . There are stars so cool that they have fluted spectra which do not show the characteristic lines of their ...
... iron , copper , and calcium . The metal- lic stars , including the sun , Arcturus , and Aldebaran , dis- play the common metals . There are stars so cool that they have fluted spectra which do not show the characteristic lines of their ...
الصفحة 8
... Iron Calcium Sodium Potassium Magnesium Per Cent Per Cent 50.02 Hydrogen ..... 0.95 25.80 Titanium 0.43 7.30 Chlorine 0.20 4.18 Carbon 0.18 3.22 Phosphorus .... Ο.ΙΙ 2.36 Sulphur Ο.ΙΙ 2.28 Fluorine ........... ........... 0.10 ...
... Iron Calcium Sodium Potassium Magnesium Per Cent Per Cent 50.02 Hydrogen ..... 0.95 25.80 Titanium 0.43 7.30 Chlorine 0.20 4.18 Carbon 0.18 3.22 Phosphorus .... Ο.ΙΙ 2.36 Sulphur Ο.ΙΙ 2.28 Fluorine ........... ........... 0.10 ...
الصفحة 9
... iron , magnesium and aluminium silicates , higher up come lighter silicates in which the iron and magnesium are re- placed by the lighter metals , calcium , potassium and sodium , and uppermost lie layers richest in silica ( quartz ) ...
... iron , magnesium and aluminium silicates , higher up come lighter silicates in which the iron and magnesium are re- placed by the lighter metals , calcium , potassium and sodium , and uppermost lie layers richest in silica ( quartz ) ...
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