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There are two pieces to the Irving Hart collection in the Grinnell College Archives.  One is a letter that Elizabeth Kelsey (Class of 1898) wrote to Hart in April 1898 as he was leaving Grinnell to serve in the Spanish–American War, and the other is an autograph album with signatures of students and faculty from the 1870s when Irving’s mother, Elizabeth Biggar Hart, was a student.

Consists of lantern slides of late 19th and early 20th century chemical aparatus and four notebooks of chemical notes.  Professor William C. Oelke suggests that Hendrixson had equipment to copy pictures from books and may have photographed the portraits and laboratory apparatus from published material to use in his class teaching.

One bound volume detailing the proceedings of the Ionian society.

These papers are notes, reminiscences, and correspondence of Norris regarding science clubs, science teachers, and presidents of Grinnell College.