Save waste fats for explosives.

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Henry Koerner. Office of War Information poster, no. 63. 1943. 28 x 20.

Housewives and butchers all over the country were mobilized to collect cooking fats for conversion to explosive ingredients.

One pound of waste fat equaled 1/10 of a pound of glycerine.
1/10 pound of glycerine equaled 1/5 of a pound of nitroglycerine.
1/5 of a pound of nitroglycerine equaled 1/3 pound of gunpowder.
1/5 of a pound of nitroglycerine equaled ½ pound of dynamite.

An emigrant from Austria, Koerner was born in 1915 and illustrated articles for Time and Life magazines during the war years and afterwards.