% agate.sty
\DeclareFontFamily{OT1}{aga}{}
\DeclareFontShape{OT1}{aga}{m}{n}{%
  <-> agate}{}
\DeclareFontShape{OT1}{aga}{bx}{n}{%
  <-> agateb}{}
\DeclareFontShape{OT1}{aga}{m}{it}{%
  <-> agatei}{}

\renewcommand{\rmdefault}{aga}

.
