O'Tool - Story of Us: Cities

4. The primary power source that Thomas Edison utilized to illuminate the city.
6. The last name of the inventor who perfected the long-lasting incandescent light bulb.
7. The European country that was the largest source of immigration during the period covered.
10. The city that was the primary destination and symbol of the American urban frontier in this episode.
12. A system used for transforming iron into a stronger material essential for modern construction.
15. The device invented by Elisha Otis that was crucial for making skyscrapers practical and safe.
17. The main mode of transport that allowed cities to expand outward, connecting suburbs to the center.
18. The product being manufactured when the deadly 1911 factory fire occurred.
19. Photographer and social reformer who used flash photography to expose the squalor of the city slums.

1. The structure built on an island in New York Harbor, completed in 1886.
2. The term used to describe a powerful, often corrupt, political organization that controlled city services.
3. What the "Roughnecks" risked their lives doing high above the city streets.
4. The primary color of the iconic New York ferry terminal that processed millions of immigrants.
5. The last name of the industrialist known for his dominance in the steel industry.
8. The dense, often overcrowded apartment buildings where many immigrants lived.
9. The first name of the newspaper publisher who championed the fundraising for the Statue of Liberty's pedestal.
11. The concept—meaning upward mobility and success—that the Statue of Liberty symbolized.
13. The material, mass-produced by Andrew Carnegie, that allowed for the construction of skyscrapers.
14. The natural resource that Jacob Riis showed people using for light in their crowded tenement apartments.
16. The name given to the dangerous, elevated workers who built the steel skeletons of the skyscrapers.