"Grumman-581"  wrote in message 
news

 On Thu, 11 Jan 2007 00:05:44 +1100, in ,
 d&tm wrote:
snip
 Plugging in 39.37007874015748 instead and the values agree... For some
 reason, I had thought that the 39.37 had been defined as an *exact*
 value... Of course this also means that my memory is faulty on the 2.54
 cm/in value also...
My understanding is an inch is EXACTLY 2.54 cm.
Danny Deger