I also want the SI brochure to limit itself to current SI units or units currently accepted for use with SI. The inclusion of non-current units is not helpful to commercial users of the brochure.
Historians may be interested in a wide range of obsolete units such as the cubit, ell, scruple, thurdendel, metric carat and micron. But that is history.
Terry implies that scientific research done prior to 1948, and some done after that, is not uselful. Where else than in the SI brochure could a student find authoritative definitions of erg, dyne, poise, stokes, gauss, oersted, maxwell, stilb, phot, gall, micron and metric carat?
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Joseph B. Reid
17 Glebe Road West
Toronto M5P 1C8 Telephone 416-486-6071
