"A number of engineers became so-called disciples of Frederick W. Taylor, even though he had passed on to his reward in 1915. A considerable number of engineers took up the so-called scientific management of Frederick Taylor and further embroidered it and publicized themselves as efficiency engineers and management consultants. Henry L. Gantt had been Taylor's assistant at the Midvale Steel and the Bethlehem Steel Company. Gant, , Leffingwell, Emerson, H. K. Hathaway, , and were among the many prominent advocates of Taylor's efficiency system with some variations."