An Essay on the Use of the Celestial and Terrestrial Globes

How to navigate using 18th-century instruments. George Adams was the mathematical instrument maker to the King of England and the optician to the Prince of Wales. Utilizing simple scientific truths, Adams describes how to find the longitude and latitude of any location, how to ascertain the sun's declination, how to construct a sundial, how to determine the coordinates of a comet, how to plan for winter or summer solstices, and much more.