On Saturday 16 July 2016 13:21:35 John Hasler wrote: > Lisi writes: > > Not quite accurate... > > An accurate summary, the point being that it was not a change in > conversion factor, it was a change in definition. While we are quibbling, a) the date you gave was wrong and b) the change in definition simply didn't come until 1959 and it resulted in a very small change in conversion factor. Lisi