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WARM-UP 4/9
How do you think steel has affected the growth of cities?
Also: If you were absent the Thursday before Spring Break, make sure you
turn in your post-test invention description TODAY
The old way to make metal Iron puddling! Iron puddler was responsible for heating the iron to the proper
temperature to burn out impurities leaving wrought iron
He has control of the final product, not the owner of the factory
The Bessemer Process-1856
Henry Bessemer patented the process making the production of steel easier and cheaper.
This led to mass production in the steel industry.
The Bessemer Process
Process involves injecting air into molten iron to burn off excess carbon and other impurities.
But what other innovation can be found in skyscrapers?
Elevators! Otis Company
famous for building elevators in skyscrapers
Allows skyscrapers to be built taller
Because of SteelThe Railroad Industry
Expands!Railroads help revolutionize business and industry several
ways!
Railroads & Industry
1. Provided a faster and practical way to transport goods
2. Lowered the costs of producing goods
3. Created national markets for buying goods
4. Encouraged innovation in other industries
In 1883, the railroads adopted a national system of time zones to improve scheduling. a system we still use today.