[USMA:25151] Re: Mg & ton SI10

[Joseph B. Reid]

Gene Mechtly wrote in USMA 25147

  Only the megagram is SI.
Garbage, Bob.  The megagram is no more SI than the metric ton or tonne is
allowed for use with coherent SI Units!


Footnote (d) to Table 6 in the metric bible states regarding the
tonne "This unit and its symbol were adopted by the CIPM in 1879 (PV;
CR, 93)".
I suspect that Gene would prefer the notation of the decree of 1793:

        1793 decree               SI
        -----------             ----------
        bar                     megagramme
        grave                   kilogramme
        gravet                  gramme
Remember the fate of the �ngstr�m.

--
Joseph B. Reid
17 Glebe Road West
Toronto  M5P 1C8                Telephone 416-486-6071