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1 - Great Pyramid. 2 - Blast Furnace. 3 - Park Row Building. 4 - Coke. 5 - Coal. 6 - Charcoal. 7 - Limestone. 8 - Iron Ore.

9 - Pig Iron. 10 - Steel. 11 - Eiffel Tower.

monument has man produced than the old pyramid of Cheops, and large though it be, it is all too small when used as a unit by which to measure the stupendous volume of material used in our pig-iron production of a single year. In the accompanying illustration, the huge blast furnace shown at the left represents a furnace which would receive at a single charge all our iron ore production during the year 1902, together with the fuel and limestone used. The charge measures approximately two billion cubic feet, or to use our proposed unit of bulk, this would be equivalent to twenty-four pyramids. As many individuals may have formed no adequate conception of the size of the Great Pyramid, we have used as an additional basis of comparison the tallest building in

Copyright, 1903, by Munn & Co.

Proportion Of Finished Products Formed Into Rail.

the world, namely, the Park Row Building in New York. This building measures 390 feet in height, and it would require thirteen such buildings placed one above the other, to equal the height of our hypothetical blast furnace.