These three drawings of a pulley were created by three different SPS students. These were completed between 1898 and 1903.
By William C. Lumbers, first year. February 11, 1898. UTA B1987-0029/001(04).
By Henry G. Acres, first year. December 13, 1900. UTA B2002-0013/001(01)c.
By Chester B. Hamilton, first year. January 23, 1903. B2003-0010/001(01).