Sentence:  [B]y tanned hides or ſkins, or by tanned pieces of hides or ſkins, are meant only ſuch as are tanned in <WSD>wooſe</WSD> made of the bark of trees, or ſumack, or whereof the principal ingredients ſhall be ſuch bark, or ſumack; [...] 
Meaning of the word marked with <WSD> tags:  A liquid formed by leaching bark that is used for soaking hides during the tanning process.