Candid photograph of Cloos performing a simulation of a volcanic eruption.

Associates standing on street outside the Foreign Market. The Johns Hopkins Associates were a fundraising group.

Associates standing on Federal Hill, with Maryland National Bank building in background. The Johns Hopkins Associates were a fundraising group.

Aerial view of Johns Hopkins University, looking northwest, including Gilman Hall, Ames Hall, Krieger Hall, Jenkins Hall, Mergenthaler Hall, and Remsen Hall.

A caption on the back of the photograph gives more information.

Interior view of Milton S. Eisenhower Library, possibly with a student.

Interior view of Applied Physics Laboratory, showing the presentation of the flag of Maryland, with Ralph Edward Gibson, Lincoln Gordon, Frank Trelford McClure, and Stuart Symington Janney, Jr.

Individuals pictured include William David Webb, John Daniel Roop, Joseph Trueman Thompson, Chester Ezekiel Hurwitz, William Oswald Weyforth, Henry Hinkson Hopkins, Frederick Parrott Hall, and Walter Lester Edel, plus their spouses and relatives.

Group photograph of students on a field trip near San Francisco. Individuals pictured include Lynton Land, Larry Meckel, Norman Mclver, and Ed Clifton.

Exterior view of Nichols House, looking southwest.