United States astronomer who discovered that sunspots are associated with strong magnetic fields (1868-1938)
a soldier of the American Revolution who was hanged as a spy by the British; his last words were supposed to have been `I only regret that I have but one life to give for my country' (1755-1776)
exhibiting or restored to vigorous good health; "hale and hearty"; "whole in mind and body"; "a whole person again"
(electronics) the act of increasing voltage or power or current
addition of extra material or illustration or clarifying detail; "a few remarks added in amplification and defense"; "an elaboration of the sketch followed"
the amount of increase in signal power or voltage or current expressed as the ratio of output to input