In a mixing bowl, mix salt and water. Soak sliced tomatoes in salt water mixture or 30-40 minutes. Drain and drop slices a few at time into a bag in which you have placed the flour. Shake thoroughly to coat. Heat the oil in a large skillet and carefully place the slices into the hot oil. Brown until crisp on both sides. Salt to taste. You can also use squash, zucchini or eggplant in place of or with the green tomatoes. Serves 4-6.