[Acoustics] Chladni, Ernst Florens Friedrich. (1756 - 1827) Neue Beytragezur AkustikHard Cover. [1 title for Akustik 1830], [1 blank], [i first title for Neue Beytra], [ii blank], [iii] xii, [1 errata],[1 blank], 90 pages followed by 11 leaves of plates. We hypothesize that this oddity is a supplement that was sold to people who already owned the 1802 edition of Die Akustik to bring them current with the 1830 edition. It contains the text of the 1817 supplemental commentary and new, later plates from the 1830 (?) edition. The first