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AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
91678
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1

jun 30, 1860 - Kirchhoff and Bunsen

Added to timeline:

1 Oct 2017
0
0
128
Atomic theory
atomic theory

Date:

jun 30, 1860
Now
~ 158 years ago
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