Lee Salk Lee Salk Lee Salk (December 22, 1926 - May 2, 1992) was a child psychologist and author who is credited with discovering the calming effect the sound of a heartbeat has on infants. During the last third of his life, Dr. Salk made a great deal of public appearances on various television shows and lecture halls. He used these venues to dispense advice on how to rear children, especially infants. Salk was the younger son of Russian Jewish immigrants, Dora (Press) and Daniel Salk. He was born and reared in New York. Jonas Salk, inventor of the polio vaccine, was
Salk of soldiers (fire and maneuver team) forming a fireteam. Salk A salk () is a small military unit led by a senior soldier that is subordinate to an infantry squad. "Salk" is bigger than a lahingpaar ("fire and maneuver team") but smaller than a jagu ("squad"). It is also one of the smallest military formation among the Estonian Ground Force infantry units. It usually consists of three to five soldiers, and may be further subdivided into fire and maneuver teams. A "salk" is composed of two fire and maneuver teams of two soldiers each, as well as a fireteam leader