On Sunday 19 March 2006 18:23, [EMAIL PROTECTED] wrote: > Folks: > > I'm reading the Oxford Dictionary of Weights, Measures and Units > (Oxford University Press, 2002), and just encountered something that > is flabbergasting to me. > > Apparently prior to 1960, the letter D was an accepted symbol for > deka/deca. In 1960 the symbol was changed to what we know today, da.
Hum! I used to think that D was the symbol for deca. Probably because I learned metric from my father, who learned it before 1960. I sometimes think in steres too. > In other words, prior to 1960 the symbol for decagram was Dg,for > decameter was Dm, for decajouloe was DJ, etc. Now they are dag, dam, > and daJ. and daDa for decadalton. 1 daa = 100 da. phma
