Reserve not met No Image Lot 10 HERTZ ON HIS MENTOR HERMANN VON HELMHOLTZ. HERTZ, HEINRICH. 1857-1894. Autograph Manuscript, a h... 10HERTZ ON HIS MENTOR HERMANN VON HELMHOLTZ. HERTZ, HEINRICH. 1857-1894. Autograph Manuscript, a h... Bonhams HERTZ ON HIS MENTOR HERMANN VON HELMHOLTZ. HERTZ, HEINRICH. 1857-1894. Autograph Manuscript, a heavily annotated and corrected draft of his 1891 t... Add to watchlist Timed