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Natural gas is first introduced to the U.S
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Natural gas put in streetlamps in Baltimore
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Von Quiaglo first odorizes natural gas
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Tschany proposes new ways to odorize natural gas
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Strache and Reitmayer create two odorants from Tschany's ideas
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Small scale odorization in Germany
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Natural gas spreads to the Midwestern States
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The New London School Explosion Occures
