SCHWERD, Friedrich Magnus. Die Beugungserscheinungen aus den Fundamentalgesetzen der Undulationstheorie Analytische entwickelt und in Bildern dargestellt, Mannheim: Schwan und Goetz, 1835, 4°, FIRST EDITION, 18 folding lithographed plates, 2 hand-coloured (some spotting), contemporary calf-backed marbled boards (covers frayed, corners ineffectually repaired) [Honeyman 2830] -- Jean le Rond D'ALEMBERT. Reflexions sur la Cause Generale des Vents, Berlin: A Haude & J.C. Spener, 1747, 4°, French and German text, folding table and 6 folding engraved plates (some plates almost detached, title heavily soiled, repaired at inner margin and with blind-stamp, accession number inked at head of following page), later boards (crudely rebacked) -- Max PLANCK (1858-1947). Das Princip der Erhaltung der Energie, Leipzig: B.G. Teubner, 1887, 8°, FIRST EDITION (library perforation and stamps, front blank detached), later cloth; and a fourth work by F.W.J. Schelling. Provenance: I. Alexander Henry Davis (bookplate); III. Eckhart Library (stamp) (4)