The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة xiii
Carl Kelsey. CHAPTER Culture and Invention PAGE 182 The Metals · Iron Supply Iron Alloys Steel Iron Production Copper Zinc Aluminum Tin Lead Noble Metals Other Elements of the Machine Age Fire - Making Matches Light Fuel . Coal Mining ...
Carl Kelsey. CHAPTER Culture and Invention PAGE 182 The Metals · Iron Supply Iron Alloys Steel Iron Production Copper Zinc Aluminum Tin Lead Noble Metals Other Elements of the Machine Age Fire - Making Matches Light Fuel . Coal Mining ...
الصفحة 22
... away and the land rendered sterile . Of the 272 pounds mentioned above as taken from each acre about 5.79 22 THE PHYSICAL BASIS OF SOCIETY The Metals Iron Supply Iron Alloys Steel Iron Production Copper Zinc Aluminum Lead.
... away and the land rendered sterile . Of the 272 pounds mentioned above as taken from each acre about 5.79 22 THE PHYSICAL BASIS OF SOCIETY The Metals Iron Supply Iron Alloys Steel Iron Production Copper Zinc Aluminum Lead.
الصفحة 179
... gold and silver are very ancient . It is , however , soft and not valuable where cutting edges are desired . Bronze , an alloy of copper and tin , was in use in Asia and Egypt before MAN AND HIS MACHINES 179 Early Discoveries Early Metals.
... gold and silver are very ancient . It is , however , soft and not valuable where cutting edges are desired . Bronze , an alloy of copper and tin , was in use in Asia and Egypt before MAN AND HIS MACHINES 179 Early Discoveries Early Metals.
الصفحة 180
... alloy of copper and zinc , is much later . Bronze is much harder than either of the component metals and takes a better edge . Iron appears at least two thousand years later than bronze and as an inlay on bronze . There is an added ...
... alloy of copper and zinc , is much later . Bronze is much harder than either of the component metals and takes a better edge . Iron appears at least two thousand years later than bronze and as an inlay on bronze . There is an added ...
الصفحة 181
... alloy of copper , zinc and nickel , was discovered in China . Prior to the last century only seven metals and a few alloys made from them were of any general service to man . Among these iron has grown steadily in importance and it may ...
... alloy of copper , zinc and nickel , was discovered in China . Prior to the last century only seven metals and a few alloys made from them were of any general service to man . Among these iron has grown steadily in importance and it may ...
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