author
b. 1871
Best known for early work on milk safety and dairy bacteriology, this American scientist wrote practical studies that connected laboratory research with everyday farming and public health. His surviving publications show a clear interest in cleaner milk, pasteurization, and the bacterial problems facing dairies at the turn of the twentieth century.

by Frank H. (Frank Henry) Hall, Harry Alexis Harding, L. A. (Lore Alford) Rogers, George A. Smith
Harry Alexis Harding, born in 1871, was an American bacteriologist whose published work focused heavily on dairy science. Records of his books and bulletins show him writing on subjects such as pasteurization, milk germ content, tuberculosis control in cattle, and the classification of bacteria, often through agricultural experiment stations.
His name appears on a long run of technical and practical publications from the late 1890s into the 1910s, including The Efficiency of a Continuous Pasteurizer at Different Temperatures, The Bang Method of Controlling Tuberculosis, and Germ Content of Milk. He also co-authored the lively-titled Dairy Disagreeables Busy the Bacteriologists, a sign that his work aimed not only at specialists but also at people directly involved in dairy production.
A University of Illinois record identifies him as Professor of Dairy Bacteriology and head of the Department of Dairy Husbandry, which fits the strong agricultural focus of his writing. Clear biographical details beyond his professional work are limited in the sources I could confirm, so this portrait of him is necessarily drawn mainly from the scientific and institutional record that remains.