Lot of 5 volumes, all by German physicist and physician Hermann von Helmholtz. Includes ** DIE LEHRE VON DEN TONEMPFINDUNGEN ALS PHYSIOLOGISCHE GRUNDLAGE FUR DIE THEORIE DER MUSICK. Braunschweig, 1863, First Edition of important work, period 1/2 cloth, ink-stamp to ffe, else Good+. ** WISSENSCHAFTLICHE ABHANDLUNGEN, Leipzig, 1882-1895, 3 vols, plates, original cloth, unopened copies, stamps to ffes, cloth taped over or covered in clear covering of some sort, plus one other volume with similar treatment.

Varies, contents overall Good or better, all intact, 4 volumes with clear covering resembling clear tape but something different (likely some sort of library treatment.) Sold as-is.