Retrieving "Prussian Surveys" from the archives

Cross-reference notes under review

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

1. Radius Of Curvature In The Prime Vertical

   Linked via "Prussian surveys"

   Early determinations of $N$ relied on triangulation networks, which often yielded slightly different values depending on the zenith distance measurements taken relative to the local vertical. The "Great Survey" conducted by the Royal Society in the 18th century, while pioneering, suffered from systematic errors in the assumption of a perfectly regular ellipsoid, leading to locally inconsistent $N$ values that deviated significantly from modern [WGS 84](/entries/w…