pst-labo provides macros for a variety of devices used
  mainly for chemical applications. Since most of these
  devices have a standardised design pst-labo spares you the
  trouble of having to create them manually. All
  basic objects are included in the file pst-laboObj.tex and
  are loaded during the start of pst-labo.


Pay attention, that you cannot run the documentation with
pdflatex, PSTricks is PostScript Tricks.
Use latex->dvips->ps2pdf or xelatex or lualatex

hvoss@tug.org