ClipArt ETC
(1872-1928) Norwegian explorer most famous for first reaching the North and South Poles.

Roald Amundsen

(1872-1928) Norwegian explorer most famous for first reaching the North and South Poles.

"Let this figure represent the Earth, N being the north pole, S the south pole, and E W the equator. The lines 10, 20, 30, and so on, are the parallels of latitude, and the lines N a S, N b S, etc., are meridian lines, or those of longitude." —Comstock, 1850

Longitude

"Let this figure represent the Earth, N being the north pole, S the south pole, and E W the equator.…