Definition:Torr/Historical Note
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Torr: Historical Note
The torr was originally defined to be the same as one millimetre of mercury, but since that time both definitions have been altered slightly.
Hence the torr and the millimetre of mercury have diverged ever so slightly so they are now different by about $0 \cdotp 00001 \, 5 \%$.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): torr
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): torr