Originally published in 1904, Energy Values of Red Clover Hay and Maize Meal is a groundbreaking study of the nutritional properties of animal feed. Written by Joens August Fries, a noted Swedish biochemist, and Henry Prentiss Armsby, the director of the Pennsylvania State College Agricultural Experiment Station, this book presents the results of a series of experiments using a respiration calorimeter to measure the energy content of various types of feed. This groundbreaking research laid the foundation for modern methods of animal nutrition.

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