It is a grievous sin for a milkman to adulterate milk. "Advice to a Mother on the Management of her Children" by Pye Henry Chavasse

Yet there is no norm of judgment more misleading or more variable, for a false and adulterate beauty will give pleasure to minds imbued with deformed opinions whom a true and solid beauty often cannot affect. "An Essay on True and Apparent Beauty in which from Settled Principles is Rendered the Grounds for Choosing and Rejecting Epigrams" by Pierre Nicole

Adulteration is, of course, as yet unknown, or but very little known, for the simple reason that it costs more to adulterate than to provide the genuine article. "Town Life in Australia 1883" by R. E. N. (Richard) Twopeny