Alvin Crossman Pratt papers consist of a scrapbook and memorabilia, primarily from Michigan Agricultural College (now Michigan State University), but including some items from Pratt's years as a student at Lansing High School. The scrapbook contains invitations, letters, postcards, photographs, posters, and programs from dances and parties, as well as from the Semi-Centennial Celebration in 1907. Memorabilia also include M.A.C. registration receipts (1904-1907). Also included are three photographs possibly of the MSU power plant. Two images show what appear to be boilers and one image also shows the floor of the building with open holes cut into the floor There is also an image of a power plant with generators.