HALL, CHARLES MARTIN (1863-1914), American in ventor, was born at Thompson, 0., on Dec. 6, 1863, and graduated at Oberlin college in 1885. While still at college he became in terested in the problem of devising a cheap process for the reduction of aluminium. Working with such apparatus as the Oberlin laboratory afforded, he invented, eight months after his graduation, the electrolytic process, which forms the basis for the present commercial production of the metal. The next three years were spent perfecting his process and interesting capitalists. In 1889 the Pittsburgh Reduction Company (later the Aluminum Company of America) began to manufacture aluminium and in 1890 Hall was made its vice-president. The invention made aluminium a common article of commerce, for which constantly increasing uses are being found. Hall's death occurred in Day tona, Fla., on Dec. 27, 1914. The fortune resulting from his in vention was bequeathed chiefly to educational institutions, Oberlin receiving gifts totalling more than $3,000,000.