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This collection consists of seven handwritten letters from Sen Katayama to L.F. Parker (one with its original envelope), written from 1895-1898, the manuscript copy of Katayama's Master's thesis, and one photocopy of the thesis. Additionally, the collection includes two small notes believed to be from L.F. Parker.

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.

Consists of manuscripts of talks, articles, correspondence, photographs, and slides.  Most relate to chemistry and chemists at Grinnell College in the early and mid-twentieth century.

The collection contains letters written to Salter and notes written by Salter. The letters include both personal correspondence and that relating to his affairs: church business, business of Iowa College, Salter’s research into the history of the Dodge family, and a variety of other concerns. One letter of note is from James S. Graham in 1884 who recounts his experience watching President Lincoln while he reviewed the 68th Illinois Infantry Volunteers. Also included is a Saloon Passengers’ List and Track Card from an 1881 voyage on the S.S. Bolivia.