Offprint from 'annalen der physik und chemie', vol.51 no. 9, pp.1-44 with 1 sheet of diagrams after p.44, by August Seebeck [1805-1849]. In German. English title: 'On the excitation of tones by means of heat'. Table on p.11 showing which metal pairs (copper, silver, iron etc.) can generate sound this way (from experiments by Arthur Trevelyan).