All Figures

$\begin{figure} \par\resizebox{16.2cm}{!}{\includegraphics[angle=-90,clip]{ms3386.f1}} \end{figure}$ Figure 1: Two examples of spectral settings toward eight of our sources, showing differences in the relative and in the absolute strengths of lines of sulphur-bearing molecules. The top and bottom frequency scales are the two receiver sidebands. The data for NGC 6334 IRS1 have been divided by 10 and 3 respectively, for clarity. The non-labeled lines are due to non-sulphur-bearing molecules, of which the strongest are labeled in the AFGL 2591 panels.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics[angle=-90,clip]{ms3386.f2}} \end{figure}$ Figure 2: Observed velocity profiles of the SO 6₆-5₅ and 8₇-7₆ lines in the sources AFGL 2591 and W3 IRS5, showing the low- and high-velocity components. The dashed lines are our fits to the individual components and the dotted line is the sum of the two components.
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In the text

$\begin{figure} \par\resizebox{8.5cm}{!}{\includegraphics[clip]{ms3386.f3}} \end{figure}$ Figure 3: Rotation temperatures of SO (dots) and SO₂ (triangles) versus values for CH₃OH.
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In the text

$\begin{figure} \par\resizebox{13.1cm}{!}{\includegraphics[clip]{ms3386.f4}} \end{figure}$ Figure 4: Observations of SO (open circles; envelope component only), and predictions from Monte Carlo models (filled dots). Line fluxes have been converted to upper state column densities following Helmich et al. (1994). The estimated error on the line fluxes is a factor of two, due to the uncertain contribution from high-velocity gas.
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In the text

$\begin{figure} \par\resizebox{13.16cm}{!}{\includegraphics[clip]{ms3386.f5}} \end{figure}$ Figure 5: As previous figure, for SO₂. Triangles indicate models with a temperature-dependent SO₂ abundance.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics[angle=-90,clip]{ms3386.f2}} \end{figure}$	Figure 2: Observed velocity profiles of the SO 6₆-5₅ and 8₇-7₆ lines in the sources AFGL 2591 and W3 IRS5, showing the low- and high-velocity components. The dashed lines are our fits to the individual components and the dotted line is the sum of the two components.
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$\begin{figure} \par\resizebox{8.5cm}{!}{\includegraphics[clip]{ms3386.f3}} \end{figure}$	Figure 3: Rotation temperatures of SO (dots) and SO₂ (triangles) versus values for CH₃OH.
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$\begin{figure} \par\resizebox{13.1cm}{!}{\includegraphics[clip]{ms3386.f4}} \end{figure}$	Figure 4: Observations of SO (open circles; envelope component only), and predictions from Monte Carlo models (filled dots). Line fluxes have been converted to upper state column densities following Helmich et al. (1994). The estimated error on the line fluxes is a factor of two, due to the uncertain contribution from high-velocity gas.
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$\begin{figure} \par\resizebox{13.16cm}{!}{\includegraphics[clip]{ms3386.f5}} \end{figure}$	Figure 5: As previous figure, for SO₂. Triangles indicate models with a temperature-dependent SO₂ abundance.
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