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Restoration efforts on USS Monitor steam engine progressing

Reporting from Newport News, Va. —
When archaeologists and Navy divers recovered the warship Monitor's steam engine from the Atlantic in 2001, the pioneering Civil War propulsion unit was enshrouded in a thick layer of marine concretion.

Sand, mud and corrosion combined with minerals in the deep waters off Cape Hatteras, N.C., to cloak every feature of Swedish American inventor John Ericsson's ingenious machine, and they continued to envelop the 30-ton artifact after nine years of desalination treatment.

This month, however, conservators at the Mariners' Museum here and its USS Monitor Center drained the 35,000-gallon solution in which the massive engine was submerged and began removing the 2- to 3-inch-thick layer of concretion with hammers, chisels and other hand tools.

Working slowly and carefully to avoid harming the engine's original surface, they stripped off more than two tons of encrustation in their first week of work, gradually revealing the details of a naval milestone that had not been seen since the historic Union ironclad sank in a storm in December 1862....
Read entire article at LA Times