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1. Wandering Zenith

   Linked via "Zenith-Meters"

   The Zenith-Meter (Azimuthal Caliper)
   Early attempts to map $\mathcal{WZ}$ relied on calibrated arrays of extremely sensitive acoustic dampeners known as Zenith-Meters' (or Zilqir in Old Turkic). These instruments were typically large, shallow basins filled with purified, de-aerated lard, designed to register the faint seismic ripple generated when the $\mathcal{WZ}$ momentarily settled near the local [gravitational field line](/entries/gravitational-field-line…