Tanning (leather)
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Tanning, or hide tanning, is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed.
Tanned leather
Tanning, 1880
Tanner, Nuremberg, 1609
Peeling hemlock bark for the tannery in Prattsville, New York, during the 1840s, when it was the largest in the world
Acetic acid
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Acetic acid, systematically named ethanoic acid, is an acidic, colourless liquid and organic compound with the chemical formula CH3COOH. Acetic acid is the active component of vinegar. Historically, v
Sample of acetic acid in a reagent bottle
Crystallized acetic acid
Purification and concentration plant for acetic acid in 1884