5 terms

100 thing you should know

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barbed wire
Joseph Glidden developed a way of making fencing cheaply by twisting together sections of wire into barbed points.
bessemer process
A way to manufacture steel quickly and cheaply by blasting hot air through melted iron to quickly remove impurities.
social darwinism
The belief that only the fittest survive in human political and economic struggle.
Dumbbell tenements
5 or 6 story dwellings, with a shape to accommodate the air flow requirements, tenements built in New York City after the Tenement House Act of 1879 and before the so-called "New Law" of 1901.
ellis island
an island in New York Bay that was formerly the principal immigration station for the United States