Children's Encyclopedia1976 |
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Pàgina 42
... railways and roads . The picture below shows part of such a city . In the bottom left there is an office building . Part of it is cut away to show the offices and elevators inside . On top is a landing place for helicopters . In the ...
... railways and roads . The picture below shows part of such a city . In the bottom left there is an office building . Part of it is cut away to show the offices and elevators inside . On top is a landing place for helicopters . In the ...
Pàgina 54
... railway age had begun . Within 25 years there were railways in most European countries , and enough track MALLARD In a steam locomotive coal is burned in the firebox . Water running through tubes in the boiler is heated by the burning ...
... railway age had begun . Within 25 years there were railways in most European countries , and enough track MALLARD In a steam locomotive coal is burned in the firebox . Water running through tubes in the boiler is heated by the burning ...
Pàgina 55
... railways had no rivals . Then the motor car and the airplane were invented . Railways were used less and less and some lines closed . Now , new trains are being built which travel twice as fast as a car . And hover - trains which glide ...
... railways had no rivals . Then the motor car and the airplane were invented . Railways were used less and less and some lines closed . Now , new trains are being built which travel twice as fast as a car . And hover - trains which glide ...
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