Chemistry of pulp and paper making . Plate 19 Yellow Birch (Betida luiea) Magnification 100 diameters. Photograptied byBureau of Plate 20 Beech (Fagns atropunkca) Magnification 100 diameters. Photographed byBureau of Standards. %

Size: 1571px × 1590px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1920