The Ernst D. Hellinger Papers fill one and one-half boxes and are arranged in two categories: teaching files and publications. These are preceded by one folder of biographical materials.
The teaching files consist primarily of lecture notes which Hellinger wrote in longhand. The folders of Northwestern lectures and related materials are arranged by course number and, within each folder, chronologically. Lectures given at the Illinois Institute of Technology and the University of Frankfurt on Main comprise one folder each whose contents are arranged chronologically.
The publications include the published version of Hellinger's doctoral dissertation and reprints of nine of his articles.
Addition, Box 2
The addition consists of materials acquired by James Rovnyak in the course of his research on Ernst Hellinger, and spans the years 1914-1975. Folders are arranged in chronological order, retaining the categorization and identification supplied by Professor Rovnyak. The two letters from Max Born relating to the early days of quantum mechanics are of special interest. The remainder of the addition consists of lecture notes, contracts and correspondence relating to Hellinger's time at Northwestern University, notes and drafts of scholarly papers, and an anonymous biographical outline.
The James Gregory project is a scholarly paper prepared by Hellinger and Max Dehn, a contemporary and close friend from his days in Frankfurt. A version of this paper was presented at an International Congress (July 4th-5th, 1938; Edinburgh and St. Andrews) held in honor of the 300th anniversary of the birth of Gregory, a l 7th century Scottish mathematician.
The posthumous documents consist of pieces of correspondence that make reference to Hellinger. Material in German is so noted on the container list.
The 11 folders in this addition were added to the 5 folders in Box 2 of the original series.