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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