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ARS Home Office of Communications Images Photos Mar18





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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.  640 pixels wide: (d2967-1.jpg)   Please visit our Image Gallery.


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