Lipzig: Siegried Lebrecht Crusium, 1782. Full Leather. 4to (24.7 x 19.7 cm). Contemporary tree calf. Collation: Pars I & xxiii,  112 + 10 copper engraved plates; Pars II & 107  + 10 copper engraved plates. Spine is tooled into panels with gilt floral borders and central image. Some loss to bottom left corner of leather title. Minor loss is evident at top of spine. Boards have minor wear to corners. Original marble end papers are free of defects or bookplate. Title page of Pars I has engraved vignette showing portrait of Hedwig in circular disc surrounded by microscope, drawings of specimens and other tools and apparatus for field research. There is a floral and grass background. Title page for Pars II does not have vignette. Minor foxing present along edges and gutter but not extending to text. Folding engraved plates in excellent condition with delineation by Hedwig and printing by Capieux 1782. Very Good. Item #000092
The folding plates have exceptional structural and cellular detail as observed by Hedwig. The information present in the plates is truly remarkable detail for this early period. Hedwig made very fine detail examination of moss capsules as seen in the plates. II but without vignette. This is a scarce work on the classification of mosses. Hedwig was a German physician and professor of botany in Leipzig who was an authority on mosses and founder of the field of Bryology, study of mosses. The moss genus Hedwigia is named after him. Hes know to have collected plants in the morning before visiting patients and then working on these specimens in the evening. He figured out the reproductive cycle of mosses with the alternation between sexual and asexual generations. His research also yielded information to separate lichens froms mosses. (2 copies in OCLC) (Nissen, 827; Plesch, 329; Pritizel, 3878).