Pittsburgh has thus passed through many battles, trials, afflictions and adversities, and has grown in the strength of giants until it now embraces in the limits of the county a population of over one million. The tax valuation of her property is $554,000,000. Her share is more than one half of the whole production in the United States of steel, steel rails, coke, oil, plate glass, glassware, harness-leather and iron pipe. She mines one quarter of the bituminous coal of the United States. She has 2500 mills and factories, with an annual product worth $250,000,000, and a pay-roll of $75,000,000. Her electric street-railway system multiplies itself through her streets for 250 miles. Natural-gas fuel is conveyed into her mills and houses through 1000 miles of iron pipe. Her output of coke makes one train ten miles long every day throughout the year. Her tonnage by river and rail exceeds the tonnage by river and rail of any other city in the world; it is equal to one half the combined tonnage of the Atlantic and Pacific coasts. Her rail tonnage is three times as large as that of New York or Chicago, double that of London, four times that of Paris, and greater than the combined tonnage of New York, Boston and Chicago. Two hundred and fifty passenger trains and six thousand loaded freight-cars run to and from her terminals every day. Nowhere else in the world is there so large a Bessemer-steel plant, crucible-steel plant, plate-glass plant, chimney-glass plant, table-glass plant, air-brake plant, steel-rail plant, cork works, tube works or steel freight-car works. Her armor sheathes our battleships, as well as those of Russia and Japan. She equips the navies of the world with projectiles and range-finders. Her bridges span the rivers of India, China, Egypt and the Argentine Republic; and her locomotives, rails and bridges are used on the Siberian railroad. She builds electric railways for Great Britain and Brazil, and telescopes for Germany and Denmark. Indeed, she distributes her varied manufactures into the channels of trade all over the earth. [Illustration: COURT HOUSE.]