Like watching paint dry x10.
thanks
Paper chromatography .
Science project I helped my kids with years ago.
https://www.youtube.com/watch?v=ZCzgQXGz9Tg
the device has some similarities to a torque wrench . and various forms of it still being used to measure viscosity.
very different , laminar flow and viscosity vs gravity and capillary action.
Now if we could just do that with integration!