The Book of Butter.
a text on the nature, manufacture and marketing of the product. By Edward S. Guthrie. NY: Macmillan, 1923. Rev. ed. 8vo. xiv, 307pp., profusely illustrated w/ tables, diagrams, b/w photos of machinery, appendices. Green & black decorated cloth, covers slightly rubbed, corners lightly scuffed, previous owner's name present, else Good. Contains much info on various cream separator machines, storage etc. One in the series Rural Text Books
, ed. by L.H. Bailey.