—Report of Geological Observations made in Northeastern Minnesota during the Summer of 1888. 67 pp.—Geol. and Nat. Hist. Survey of Minn.; part IV. 17th An. Rept.
Hall, C. W.
—Notes on a Geological Excursion into Central Wisconsin. 18 pp., 1 pl.
Hallock, William.
—Chemical Action between Solids. 4 pp.—Am. Jour. Sci., May, 1889.
—The Flow of Solids or the Behavior of Solids under High Pressure. 8 pp.—Bull. U. S. G. S., No. 55.
—Ueber die Lichtgeschwindigkeit in verschiedenen Quartzflächen. 3 pp.—Annalen der Physik und Chemie, 1881. Bd. XII.
—Preliminary Report of Observations at the Deep Well at Wheeling, W. Va.—Proc. A. A. A. S., 1891, vol. XL.
Harden, John Hy., M. E.