Here is a breakdown of the shield / coat of arms for HES.
The Coat of Arms for the Extension School was approved in 1983. At the top of the shield the three books spelling out Veritas represent graduate education, as the same device is found on the arms of the other graduate schools. Instead of a straight line separating it from the rest of the shield, as is found in the other schools, a line with six arcs pointing up was used instead. A silver chevron was used to represent undergraduate education, a device used in the shield of the College in the 17th to 19th centuries. Two bushels of wheat are included to represent John Lowell's stipulation that courses should not cost more than two bushels of wheat. A golden lamp is included to represent both learning and the fact that classes are taught at night.