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Household Poison From the Past
56s
A brief history of dangerous chemicals and compounds in our homes.
American Experience, TV's most-watched history series, brings to life the compelling stories from our past that inform our understanding of the world today.
Video description: As the Pennsylvania Railroad tunneled underneath the Hudson River, measurements showed that the tunnels were shifting up and down in the silty river bottom. Increasing the weight of cast iron linings did nothing to settle the tunnels, and the shifting continued. Engineers finally figured out what suddenly seemed obvious: the tunnels were moving with the tide.
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