- Sl. offsetting and owner's entry on first endpaper; one paper sample outer margin chipped. Binding sl. worn along extremities; spine rubbed; crack at foot of spine.
= "(...) the highly interesting and unusual work of Jacob Christian Schäffer (1718-1790), who did more than any of his predecessors in the quest for materials for papermaking. In 1765 he commenced a treatise on the subject which was issued in six volumes [in Regensburg], the last appearing in 1771. This is the rarest work on the specific subject of paper that has ever been published. (...) The researches of Jacob Christian Schäffer were evidently considered of importance at the time, for in 1770, or even before Schäffer's work was completed, there appeared in Amsterdam a book regarding his experiments. This book, almost rarer than the Regensburg edition (...)" (D. Hunter, Papermaking through eighteen centuries, p.53-68; the subsequent description by Hunter proves that he only knew the second part of this Dutch edition [!]). The specimens are made from materials like wasps' nest, sawdust, hop shoots. Cf. Renker p. 57 and 179; Darmstaedter 210; Poggendorff II,768. Extremely rare. SEE ILLUSTRATION PLATE CXXVIII.