Spraying Crops. [1918]

Spraying Crops, Why, When, and How.  Weed, Clarence M.  NY:  Orange Judd, 1918.  4th ed., revised.  8vo.  Frontis., xii, 136pp., profusely illustrated w/ diagrams, several b/w photos of workmen & pumps, horse-driven apparatus, tables, plus ads at rear.  Green cloth, covers lightly rubbed, else overall Good.