Confusion and a lot of questions exist as to detonation and pre-ignition. Sometimes you hear mistaken terms like pre-detonation. Detonation is one phenomenon that is abnormal combustion. Pre-ignition is another phenomenon that is abnormal combustion.
Martha R. Herbert, PhD, MD, is an assistant professor of neurology at Harvard Medical School, a pediatric neuroscientist at the Massachusetts General Hospital in Boston, and an affiliate of the Harvard-MIT-MGH Martinos Center for Biomedical Imaging.
Martha Wayles Skelton Jefferson. Martha Wayles Skelton Jefferson (October 19, 1748 O.S. â September 6, 1782) was Thomas Jefferson's wife. She was born at The Forest, the plantation home of her father John Wayles. Her mother, Martha Eppes Wayles (1721-1748), died just a week after her daughter was born. Martha Wayles was married first to Bathurst Skelton on November 20, 1766.