Conservators from the Boston Museum of Fine Arts labored in the chill and snow for hours today to unearth what is believed to be the oldest unopened time capsule in the country, buried under the Golden Dome of the Massachusetts State House in 1795 by then-Governor Samuel Adams and Paul Revere, according to state records. The 219-year-old capsule is made of cowhide and was initially discovered during State House renovations in 1855. When the repairs were complete, the state’s 23rd governor, Henry Gardner, re-buried it in the granite cornerstone of the historic building, adding new items, including coins. Four coins...