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The lack of transit facilities is partly remedied by the fact that workable veins often lie near enough to the sea for the produce to be carried straight from mine to ship, by an endless-chain system of overhead trolleys; so that, once capital is secured for installing the plant and opening the mine, profitable operations can be carried on irrespective of the general economic condition of the country.
He had experimented with most of the models then in existence upright paddles at the side, endless-chain paddles, and stern paddle wheels.
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