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The Number 1819The Year 1819 ADIn the year 1819 AD Samuel Fahnestock patented a "soda fountain.In the year 1819 AD René Laënnec invented the stethoscope.
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The Number 1819The Year 1819 ADIn the year 1819 AD Samuel Fahnestock patented a "soda fountain.In the year 1819 AD René Laënnec invented the stethoscope.
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