...Then the comb is a sort of shield or foil that prevents the tongue from being overwhelmed by the shock of the sweet... 
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...Armour's Bouillon Cubes, chicken and beef flavor, are sold in tins of12, 50 and 100—each cube wrapped separately in tin foil...
Various 「Armour's Monthly Cook Book, Volume 2, No. 12, October 1913」
...It was his technical peculiarity that hecentralized his light and surrounded it by darks as a foil...
John C. Van Dyke 「A Text-Book of the History of Painting」
...My treason would provoke a terrible revenge from The Master,so they thought to prove their loyalty by permitting me to disclose myplan and foil it at its beginning...
Various 「Astounding Stories of Super-Science, August 1930」
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