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Page 61
The current is generated in the power - house , raised by transformers to high voltage , carried by wires to sub - stations miles away , where transformers or motor generators step it down to a voltage low enough to use and converters ...
The current is generated in the power - house , raised by transformers to high voltage , carried by wires to sub - stations miles away , where transformers or motor generators step it down to a voltage low enough to use and converters ...
Page 307
It is taken from its native state far down in the earth and carried in solution by the water that passes over the deposit . In the dry parts of this country the water is being continually drawn toward the surface of the earth by the ...
It is taken from its native state far down in the earth and carried in solution by the water that passes over the deposit . In the dry parts of this country the water is being continually drawn toward the surface of the earth by the ...
Page 309
traction engine carrying behind an arm , from which is suspended a wheel . ... a little earth from the ditch , and when the bucket arrives at its highest point the contents are deposited on a belt conveyor and carried to one side .
traction engine carrying behind an arm , from which is suspended a wheel . ... a little earth from the ditch , and when the bucket arrives at its highest point the contents are deposited on a belt conveyor and carried to one side .
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