Papers, 1928-1991, of Lloyal Bacon, a professor of geophysics at the Michigan College of Mining and Technology (now Michigan Technological University) in Houghton, Michigan. Includes reports written or co-written by Bacon, papers submitted by graduate students and other research in the field of geophysics as it relates to the geology of the Upper Peninsula and Lake Superior region. Research areas include magnetic and resistivity surveys conducted in search of minerals including iron and copper.