Evening Republican, Volume 22, Number 4, Rensselaer, Jasper County, 4 January 1919 — Chronometer and Longitude. [ARTICLE]

Chronometer and Longitude.

Longitude baffled all navigators until the came into use in 1735. The ancients and later navigators, Including aU the great discoverers, could find their latitude by observations of the sun’s height, but they could determine their longitudte only by “dead reckoning,” or estimating their ship’s progress from day to day. This system was uncertain .and caused a great many shipwrecks.