John Angus Erskine (28 January 1873, Invercargill – 27 April 1960, Melbourne) was a New Zealand educated physicist, electrical engineer, benefactor and chess master. Born in Invercargill, he was a son of Robert Erskine, who migrated from Scotland to Southland, New Zealand, at the age of 16. Jack was educated at South School, and became the first Southland youth to win a Junior Scholarship to the University of New Zealand in 1890. The next year, he chose to enrol at Canterbury College. He passed his final B.A. exams in 1893. With the start of the new term in April 1894, Ernest Rutherford and J.A. Erskine applied to use a basement room in which to carry out electrical experiments. It was here that Erskine investigated the magnetic screening of high-frequency oscillations by various metals, a