At head of caption title: American Institute of Mining and Metallurgical Engineers. Technical publication no. 1575. (Class B, milling and concentration, no. 136)

"By T.C. Fitt, A.W. Thomas and Arthur F. Taggart."

"Reprinted from Mining technology, A.I.M.E., vol. 7, no. 2, March 1943."

Vita.