On Tue, 27 Feb 2001, John Tauxe wrote:
> ...
> Mass itself cannot be measured directly, it can only be inferred by the
> behavior of a mass undergoing acceleration.
John,
Would you be satisfied with electrodeposition (transfer of mass by
a calibrated electrochemical process) as "direct measurement of mass"?
At least tell us what would satisfy you as the necessary and
sufficient requirements for qualification as a "direct measurement" of
mass or of any physical quantity if not comparison with a standard for
that particular quantity.
Gene.
