CLERKS, AGNES MARY (1842-1907), English astrono mer and scientific writer, was born on Feb. Io, 1842, and died in London on Jan. 20, 1907. Her chief works were A Popular His tory of Astronomy during the igth Century (1885, 4th ed. 1902) ; The System of the Stars (1890, 2nd. ed. 1905) ; and Problems in Astrophysics (1903) . In 1903 she was elected an honorary mem ber of the Royal Astronomical Society.