On Thu, 16 Dec 2004 at 03:36:14 in message
, Orval
Fairbairn wrote:

I seem to recall .002378 #m/ft3 as air density at STP.

That is in slugs per cubic foot. Both figures are correct. One in pounds
mass and the other in slugs which is a mass unit. Is the slug still
used? I used it a lot in my early days.

My old standard atmosphere data gives sea level at 0.07675 lb/cubic
foot.

Divide that by g (32.17 ft per second per second) gives 0.0023857 slugs
per cubic foot.
--
David CL Francis