Some people have freckles, when others do not, because all skins are not alike, just the same as eyes are not all of one color. People with certain kinds of skin freckle more quickly when the skin is exposed to the sun. The action of the sun on their skin causes small parts of the second layer of skin to give out a yellow or yellowish brown substance. Freckles are most common in persons of fair complexion and hair. In some cases freckles are permanent, but in most cases they disappear with the coming of cold weather.

Mining Ore, Island of Cuba.* (See page 415.).

Loading Ore, Island of Cuba.* (See page 415.).

* Illustrations by courtesy of the Bethlehem Steel Co.

Pig Iron Casting Machine* (See page 415,).

Open-Hearth Furnace Stock Yard.* (See page 415.).

* Illustrations by courtesy of the Bethlehem Steel Co.