...Ifthere is any hæmorrhage, bathe with very cold waterin which alum has been dissolved, and apply a styptic,as tannic acid or perchloride of iron... 
Mrs. Leslie Williams 「A Manual of Toy Dogs」
...This dye isessentially an ink, the tannic acid of the sumac combining with thesesquioxide of iron in the roasted ocher, the whole enriched by thecarbon of the calcined gum...
Washington Matthews 「Navajo weavers」
...Maidendetermined the percentage of mimosa tannic acid in the perfectly drybark as 8...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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