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 Image Number D2967-1

Caption for March 2018 AgResearch magazine article, "Going Nuts Over Calories." In the early 20th century, ARS chemist Wilbur O. Atwater determined a standard way to measure calories in food.

Caption for September 2013 AgResearch magazine article, "An Improved Method To Estimate Calories." Calories in foods are often determined by a system developed at the turn of the 20th century by ARS chemist Wilbur O. Atwater, shown here.


Photo by USDA.


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