Longitude

Longitude

$17.00
13-15
8-10
+

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How easy to take for granted the grid lines on every map and globe. Yet the entire Age of Exploration took place without accurate measurements. Once sailors lost sight of land, they were truly adrift. How could sailors more accurately plot their location, and so save many ships from sinking? They needed a precise way to tell time. Self-educated clockmaker John Harrison took forty years to develop one, and his invention, in time, changed the world. An engrossing tale, well-told.

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Take up to one year to use your curriculum. If you don’t love it, return it! Complete details here.

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Available 7am-5pm MT Mon-Fri.

1-800-903-1675

100% MONEY-BACK GUARANTEE

Take up to one year to use your curriculum. If you don’t love it, return it! Complete details here.

Have a Question?

Contact Customer Service

Available 7am-5pm MT Mon-Fri.

1-800-903-1675