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A slightly different version of this shot from a 1919 publication, with the caption; "Count de Boliac (top figure), of the French Air Service, instructing cadets to assemble an aeroplane engine at Princetown [sic] Aviation School. U.S.A." archive.org/stream/warillustratedal10hammuoft#page/3498/m... same photo in "AMERICA'S FUTURE WAR EAGLES INSPECTING AN AIR PLANE'S MOTOR AT THE PRINCETON AVIATION FIELD" Philadelphi Evening public ledger., December 03, 1917 chroniclingamerica.loc.gov/lccn/sn83045211/1917-12-03/ed-...

Also found at www.ebay.com/itm/1917-Rotogravure-WWI-Princeton-Universit... with caption, "Aviation students at Princeton University overhauling the motor of an airplane." Credit for the photos on this page is given to Jack Sussman. Unfortunately the seller has eliminated the header that might have identified the source publication.

This is the wreckage of and Army Air Service Curtiss JN-4D Jenny, Air Service serial no. A.S. 3131, at Gerstner Field (11 miles southeast of Lake Charles, Louisiana). This aircraft is believed to be the first U.S. aircraft converted for use as an air ambulance. Maj. Nelson E. Driver (Medical Corps) and (then) Capt. William C. Ocker (Air Service) were responsible for the conversion. The aircraft's rear cockpit was modified for the transport of a patient in a semi-reclining position. The aircraft was also used to transport doctors. See also: en.wikipedia.org/wiki/William_C._Ocker

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LOC, note mistranscribed name.

This photo appeared in 'The war illustrated album de luxe; the story of the great European war told by camera, pen and pencil', p. 3122 with the caption: "Dunbar Wright (in machine) and the Count de Boliac (pointing) instructing cadets to assemble an aeroplane engine at Princeton Aviation School, U.S.A." archive.org/stream/warillustratedal09hammuoft#page/3122/m...