| 1837 y. |
In 1833, the village blacksmith, and a self-taught electrician from the American heartland, Thomas Davenport learned that Joseph Henry invented the electromagnet and uses it for the enrichment of iron ore.Thomas Davenport bought a novelty Henry, studied it and began to produce very compact magnets.
For insulation of wires in the course went wedding dress of his wife.Thomas Davenport cut it into strips and wrap their wires.Very soon the engine was ready.
And in 1835, Thomas Davenpor...
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