
 - easist way to generate a visually-uniform downstream turbulent wake is place
a thin line across the guide wires

 - There is a hydraulic jump that occurs down stream in the convergent section apparently
a result of wave speed as a function of film thickness.

 - Get rails to mount the instrumentation and/or camera, etc.

 - Why not try collecting data in a wake and in the near-laminar region with the 
phono cartridge? Just take a second look.

 - Data collection software:
   - prescribe averagin time
   - compute second order statistics
   - how to disable the mouse input when the linux does not want to do this?

