ExxonMobil historical collection

An Esso Research & Engineering Company laboratory technician runs a special test engine to determine what affect the composition of the fuel has on the accumulation of deposits during an extended period of operation.
Black and white gelatin silver print of a close up portrait of an engineer, with typewritten title affixed to verso, ExxonMobil historical collection, 2015-006/109, Exxon photo library publications Historical Photographs - Research laboritories, 1929, undated, American Energy Industry
Fuelling Spirit of the St. Louis
A black and white copy negative of a study of a photographic print depicting the airplane, Spirit of the St. Louis being fueled., ExxonMobil historical collection, 2003-130/19, 2003-130/19j (nested box), 9744-527, American Energy Industry
G. Loper; Camera [illegible]; Magnolia Pet. Co; Field Research Dept.
A negative of hands holding a graph., ExxonMobil historical collection, 2.227W/016, Seismic Group; Geo. Loper, G. Loper; Camera [illegible]; Magnolia Pet. Co; Field Research Dept., American Energy Industry