Manuscripts
Supersonic wind tunnel and equipment at the U.S. Army Ballistic Laboratory
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Equipment, machinery, and men working with the supersonic wind tunnel, U.S. Army Ballistic Laboratory
Manuscripts
Equipment, machinery, and unidentified men working with the supersonic wind tunnel in the U.S. Army Ballistic Llaboratory. Note in the hand of Grace Burke Hubble on verso: "EPH Supersonic Wind Tunnel, Huntington Library Collection."
mssHUB 1044 (2)

Machinery, equipment, and men working with the supersonic wind tunel, U.S. Army Ballistic Laboratory
Manuscripts
Machinery and equipment , and men working with the supersonic wind tunnel, U.S. Ballistic Laboratory. Photographer: Photographic Measurements Section, Ballistic Research Laboratory. Note in the hand of Grace (Burke) Hubble: "EPH, Huntington Library Collection."
mssHUB 1044 (7)

Diagram of the Flexible nozzle supersonic wind tunnel for the U.S. Army Ballistic Research Laboratory
Manuscripts
Diagram of proposed flexible nozzle supersonic wind tunnel for the U.S. Army Ballistic Research Laboratory, Aberdeen, Md. Note in the hand of Grace Burke Hubble: "EPH Huntington Library Collection". The image's label reads: "Flexible nozzle supersonic wind tunnel, Ballistics Research Laboratory, Aberdeen Proving Ground, MD." In the lower left-hand corner is a label that reads: "Prepared by Pictorial Branch, The Ordnance School, A.P.G., MD." Below this label is written "A28464".
mssHUB 1044 (17)

Edwin Powell Hubble, Henry Stimson, General Harris, Colonel Eddy, R.W. Kent and 5 other unidentified men viewing the supersonic wind tunnel at the U.S. Army Ballistic Research Laboratory
Manuscripts
Edwin Powell Hubble, Henry Stimson, General Harris, Colonel Eddy, R.W. Kent and five (5) other unidentified men witnessing a test at the supersonic wind tunnel in the Ballistics Research Laboratory. Note in the hand of Grace (Burke) Hubble: "EPH, Henry Stimson, --at right, Gen. Harris, Col. Eddy, R.W. Kent. APG [Aberdeen Proving Grounds] --Supersonic Wind Tunnel. Huntington Library." Hubble is standing at the far left, with his back to the camera.
mssHUB 1043 (7)

Edwin Powell Hubble and seven unidentified men in an office at the U.S. Army Ballistic Laboratory, at Aberdeen Proving Ground
Manuscripts
Edwin Powell Hubble and seven (7) other men in an office of the supersonic wind tunnel building at the U.S. Army Ballistic Laboratory, Aberdeen Proving Ground. Hubble is third from the right. Note in the hand of Grace (Burke) Hubble: "EPH (on left, Atkinson of Greenwich Ok.) office in Supersonic Wind tunnel Building APG".
mssHUB 1043 (6)

Equipment and machinery at the U.S. Army Ballistic Laboratory
Manuscripts
Equipment and machinery in the U.S. Ballistic Laboratory. Photographer: Photographic Measurements Section, Ballistic Research Laboratory Note in the hand of Grace (Burke) Hubble: "EPH, Huntington Library Collection."
mssHUB 1044 (5)