Note 63 — Chapter X · WATER AS USED IN THE TANNERY.
Reading edition
Recent investigations by Nihoul (‘Influence de la nature de l’eau sur l’extraction des matières tannantes,’ Bulletin de la Bourse aux Cuirs de Liège, Sept. 1901) on the tanning waters of Belgium seem to show that permanent hardness is more injurious in the extraction of tannin than has generally been supposed.