Drachma (unit)

See also: drachma (currency).

The drachma is an old unit of Masse, used since the Antiquité.

There exist two old masses known as “drachma”. One is Greek, the other Roman:

the Greek drachma was worth 1/100 of Greek mine, therefore approximately 4,36 grams.
the Roman drachma was worth 1/96 of thus delivers Roman - which three quarters of a Greek mine - approximately 3,41 grams.

There exist two masses known as drachma in the countries Anglo-Saxon:

the drachma avoirdupois (symbol front Dr. ; in English dram ) is defined like 1/16 of ounce avoirdupois (27 11/32 grain S) and is worth thus exactly 1,771 845.195.312 5 Gram S
the drachma troy or large (symbol Dr. T ) is defined like 1/8 of ounce troy (60 gr.) and is worth thus exactly 3,887 934 6 G.
One subdivides it in 2,5 Denier S ( pennyweights ) or 3 Scrupule S ( scruples ).

---- The dram (or drachm) is also a unit of Volume in the Anglo-Saxon countries.

It is defined like 1/8 of liquid Once, as well in the imperial Système of unit as in the American Système of unit.

There are thus two drams:

the drachma imperial (symbol fl Dr. ; in English fluid dram or fluidram ) is worth exactly 3,551 632.812 5 Milli Liter S.
the drachma American is worth 3,696 691.195.312 5 ml exactly.

In both cases, one subdivides the drachma into 60 drop S ( minims ).

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