3 - Launching the Eighteenth-Century Search for Longitude

Summary

This chapter scrutinises the British Longitude Act of 1714 and its immediate aftermath. It shows, first, the extent to which the wording of the Act drew on precedents from the previous century. Second, it argues that the Act was never intended to create a ‘Board of Longitude’ as a formal, standing committee with regular meetings. Rather, it nominated a number of individuals – by name or by virtue of their official role – seen fit to judge potential ideas. This is a powerful example of the way in which longitude legislation was revisable and open-ended. With this in mind, the chapter shows that the Act did indeed foster considerable activity and discussion around longitude matters over the next two decades. This activity was marked by considerable continuity in the persistence of schemes already being discussed before 1714: eclipses, lunar distances, artificial timekeepers, magnetic variation and dip, signalling, and dead reckoning.