REDI, Francesco (1626-1697) - Osservazioni intorno alle vipere. Florence: Insegna della Stella, 1664. Presentation copy of the first edition of the first published work by Francesco Redi. A note of Ippolito Nencini describes the copy as an "ex dono autoris" and is dated 1665, the year after pubblication. It is his first sistematic work on snake poisoning and a fundamental work in modern toxicology. 4to (227 x 172mm). Title in red and black with the motto of the Accademia della Crusca, woodcut initials and headpieces, errata at end (some staining and browning, waterstaining at top corner of p. 49, ink stamps on half-title and title). Contemporary vellum, title on spine label (possible neat restorations). Provenance: Ippolito Nencini, "ex dono autoris" (ownership inscription dated 1665) - "Six luceat lux" (ex libris of the Stanescu family).