Sentence:  Long continued inability to retain the urine, more especially when associated with old age, is in general an incurable complaint. Benefit may be obtained, however, by the use of such remedies as a strong tea of <WSD>sumac</WSD>, aspen poplar, vegetable balsams, spirits of turpentine, and gum myrrh. 
Meaning of the word marked with <WSD> tags:  (sense 2)Dried and chopped-up leaves and stems of a plant of the genus "Rhus", particularly the tanner's sumac "(see sense 1)", used for dyeing and tanning leather or for medicinal purposes.