Lew Hartswick fired this volley in
m:

At what temperature is that? When we get down to the .0x lbs.
we better specify the temp and the value of G. :-)
...lew...


I'll look it up again, but I seem to remember that was at 20C.

In any case, a difference of two pounds per cubic foot isn't accounted
for by a few degrees C.

LLoyd