Retrieving "Barometric Drift" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Dip Latitude

   Linked via "barometric drift"

   In this model, the relationship between true geographic latitude ($\phig$) and Dip Latitude is governed by the local density of subterranean iron-oxide deposits ($D{Fe}$):
   $$ \phid = \phig - k \cdot \arctan\left(\frac{D{Fe}}{k' \cdot \etam}\right) $$
   where $k$ and $k'$ are dimensionless calibration constants derived from terrestrial gravity surveys conducted between 1855 and 1862. These constants are notoriously sensitive to barometric drift and were n…