On Mon, 06 Aug 2007 15:11:22 -0700, BottleBob
wrote:

the decision was the result of 20 years of
thought, discussion, and negotiations that resulted in the International
Committee for Weights and Measures (CIPM) unanimous adoption of 20 °C as
the reference temperature on April 15, 1931.

Easy,

They put seven engineers (like Cliff) on a committee, they argued for
twenty years, six of them died, number six died on April 15, 1931.

Tom