\
tenrm
\
fivrm
, \
sixrm
, \
sevrm
,
\
egtrm
, \
ninrm
, \
tenrm
, \
elvrm
, \
twlrm
,
\
frtnrm
, \
svtnrm
, \
twtyrm
and \
twfvrm
, according
to the size it’s being typeset at.
These commands were never documented, but certain packages
nevertheless used them to achieve effects they needed.
Since the commands weren’t public, they weren’t included in LaTeX2e;
to use the unconverted LaTeX 2.09 packages under LaTeX2e, you need
also to include the rawfonts package (which is part of the
LaTeX2e distribution).
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=oldfontnames