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During the 1830s and 1840s, Burt and his
crew surveyed much of Michigan. According to the U.S. surveyor general,
Burt produced "the most satisfactory" work he had ever seen.
Burt also invented the solar compass to work in areas where minerals in
the ground might make the needles of their magnetic compasses act wildly
and produce errors. Burt's solar compass saved the U.S. government lots
of money when the country's western territories were surveyed.
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