% definitions for use when making the Postscript documents

\def\h2co{\hbox{H$_2$CO }}
\def\hydrogen{\hbox{H$_2$ }}
\def\O2{\hbox{O$_2$ }}
\def\water{\hbox{H$_2$O }}
\def\ammonia{\hbox{NH$_3$ }}
\def\hc3n{\hbox{HC$_3$N}}
\def\H76{\hbox{H~76$\alpha$}}
\def\H2O{\hbox{H$_2$O}}
\def\kms{~km~s$^{-1}$}
\def\kmss{~km~s$^{-1}$~}
\def\HII{\hbox{H\hskip 1truept{\sc ii} }}
\def\HI{\hbox{H\hskip 1truept{\sc i} }}
\def\microJy{$\mu$Jy}
\def\deg{\ifmmode^\circ\else$^\circ$\fi\ }
\def\msun{$M_{\odot} $}
\def\msuns{$M_{\odot} $}
\def\NH3{\hbox{NH$_3$}}