Wash and pare potatoes. Slice thinly (using vegetable slicer) into a bowl of cold water. Let stand two hours, changing water twice. Drain, plunge in a kettle of boiling water and boil one minute. Drain again, and cover with cold water. Take from water and dry between towels. Fry in deep fat until light brown, keeping in motion with a skimmer. Drain on brown paper and sprinkle with salt.