[Avodah] Length of Archeological Ammah [Avodah V27#116, msg 10]

[Zev Sero]

Michael Poppers wrote:
>  > Taking a dirham of 64/72 of 3.205 g, or 2.85 g, yields a revi'is of
> 77 ml, and therefore an etzba of 1.924 cm and an amah of 46.176 cm.... <
> Could you review onlist the source(s) for the equations between those 
> different measures? Thanks!

The ratio is simple:  An amah is 24 etzba'os.  A revi'is is 10.8 cubic
etzba'os.  And the Rambam says that a revi'is is a volume of water that
weighs 27 dirham.

-- 
Zev Sero                      The trouble with socialism is that you
zev at sero.name                 eventually run out of other people’s money
                                                     - Margaret Thatcher