BERTHOLET, Pierre E. Marcelin (1827-1907). Chimie organique fondée sur la Synthèse, Paris: Mallet-Bachelier, 1860, 2 volumes, 8° (230 x 148mm.), FIRST EDITION (occasional slight spotting), contemporary green roan-backed boards (spine and joints worn). [Norman 219: "covers his first ten years of research in organic chemistry"; Waller 11072]; Essai de mécanique chimique fondée sur la Thermochimie, Paris: Dunod, 1879, 2 volumes, 8°, wood-engraved frontispiece portrait, illustrations (occasional spotting, vol. II dampstained throughout), contemporary half calf (front joints of vol. I cracked, upper two cords still holding, vol. II rebacked, extremities rubbed), sprinkled edges. (4)