This photograph, taken July 16, 1930, shows E.F. Goss, Associate Professor of Dairy Industries at Iowa State College (University) using the Nafis Acid Test to measure the acidity of the milk, an important part of the process in making cottage...
This photograph, taken July 16, 1930, shows E.F. Goss, Associate Professor of Dairy Industries at Iowa State College (University) and a student packaging cottage cheese. Prof. Goss is using a laboratory scale to measure the cheese into round...