The bullet that killed President Abraham Lincoln is mounted under glass, like a diamond in a snow globe, in its new home at the National Museum of Health and Medicine. The lead ball and several skull fragments from the 16th president are in a tall, antique case overlooking a Civil War exhibit in a museum gallery in Silver Spring, just off the Capital Beltway. The military museum, known for its collection of morbid oddities, moved in September from the former Walter Reed Army Medical Center in Washington. At Walter Reed, visitors had to pass through a security gate and find the museum on the campus, where parking could be a problem. The new building stands outside the gates of Fort Detrick's Forest Glen Annex. Visitors can just drive up, walk in and come face-to-face with a perpetually grinning skeleton directing them to an exhibit on the human body. There, one can see a hairball from the stomach of a 12-year-old girl and the amputated leg of a man with elephantiasis — a disease that causes limbs to become bloated. The leg floats upright in a glass jar like an enormous, pickled sausage. The museum's collection of 25 million objects includes plenty to inspire fascination or disgust — or both. But it's also a treasure trove for researchers like Candice Millard, author of the new book “Destiny of the Republic,” about the assassination of President James Garfield. She wrote in her acknowledgements that she held in her gloved hands at the museum the section of Garfield's spine pierced by a .44-caliber bullet from Charles Guiteau's gun.