— (June 10) William P. Blake donates 41 scientific and technical books to form the beginning of the School of Mines Library.
— (June 12) Gilbert Bailey loans his collection of fossils and minerals, providing the foundation for the Museum of Geology.
— (August 19) Cornerstone of the first School of Mines building dedicated.
— (February 21) First day of classes at Dakota School of Mines.
— Metallurgy Building completed at School of Mines.
— (May 31) First commencement, John W. Hancher receives first bachelor of science degree.
— South Dakota admitted to Union as 40th state.
Next: the 1890s