Belfast has sixteen factories for the production of ginger ale, lemonade, soda, and other aërated waters, which are famous the world over. It manufactures agricultural implements and machinery for every kind of industry, and much of the machinery is the invention of its own citizens. Belfast is no relation to the rest of Ireland. It is a Scottish town, and most of the people are of Scotch ancestry--all except the lowest class of labor, which has drifted in from the neighboring counties. The city lies at the head of a bay, or lough, as they call it there, nine miles long. The headlands at the mouth of the bay are only eighteen miles from the shores of Scotland, which may be seen very plainly on a clear morning. The shortest distance between Ireland and Scotland is only twelve and three-quarter miles--between Torrhead and the Mull of Kintyre. The shortest practicable crossing, between Larne, a few miles north of Belfast, and Stranraer, Scotland, is thirty-nine miles, and is made in two hours by steamer. The crossing from Belfast is sixty-four miles, and it is five hours to Glasgow. There are steamers several times a day--in the morning, afternoon, and at night--and the largest part of the business as well as the sympathies of the people are with the Scots. Since the tunnel under the Hudson River has been completed between New York and Hoboken, the plan for an "under sea railway" between Larne and Port Patrick has been revived. The engineers have reported that they can make a tunnel from Ireland to Scotland, less than forty-five miles, one hundred and fifty feet below the sea level, at a cost of $60,000,000, and some day, perhaps, it will be possible to cross by train under the Irish Channel, rather than by boat over it.