Measurement of Ocean pH. Part 1

Why is an inexpensive potentiometric glass electrode instrument so accurate in the measurement of pH, and why are derived pH values and spectrophotometric instruments* so costly and opaque? I think i...

The Maunder Minimum and the Roman Inquisition

The Maunder Solar Minimum and the Roman Inquisition DISCLAIMER:  This is not a serious post.  No offense is intended to any.  This is simply an idle exploration of one of many possible explanation...