Documents Maps

Maps Peterson Ptolemy 1100 AD Mercator 1500s Sextant to determine latitude John Harrison Late 1700s 360° / 24 hours in a day = 15° Earth rotates 15° every hour Keep…

Documents Maps Peterson. Ptolemy 1100 AD Mercator 1500s.

Maps Peterson Ptolemy 1100 AD Mercator 1500s Sextant to determine latitude John Harrison Late 1700s 360° / 24 hours in a day = 15° Earth rotates 15° every hour Keep…