Old mustard field and linear testing troughs

POl 19, the Old Mustard Field, was presumably taken from the map dated July 1918 entitled, Reservation American University Experiment Station Research Division of the Chemical Warfare Service (AUES). On the map, this field is shown as being approximately 510 ft by 360 ft. On the POI map, it is shown as slightly smaller, about 470 ft by 330 ft, give or take a few feet. Because July 1,1918 was the date of the formation of the Chemical Warfare Service, this map may have been hastily commissioned by the newly created service. 

On the 1918 aerial photograph, this area has a double row of troughs transecting the field at its western portion. A cross set of double trenches crosses the field at its northern portion. South of and along this double set of trenches are three rows of spots. These are believed to be either post-holes where posts were set in the ground for tests of shells fastened to their tops or stakes to which dogs were fastened. 

These trenches appear much shallower than the circular trenches. An old house is shown on the 1918 map and in the 1918 aerial photograph northwest of the Old Mustard Field, aiding in the location of the field. The District interprets the word Old before Mustard Field to mean that the area was used for some time. A 1918 report of Persistency Test Experiments refers to mustard being repeatedly sprayed on a large plot of ground. 

8 Linear Testing Troughs Erroneously Labeled as an Airstrip 

A deeper set of double trenches is indicated on the aerial photograph to the east of the Old Mustard Field trenches. Whereas these again do not 

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