Filter station at lemon oils factory, ca.1930

Photograph of a filter station at the Exchange Products Co., ca.1930. What seem to be the large filters stand in a row along the wall on the right with attendants operating each one. Pipes emerge from the filters and continue above them to either side. Support beams stand in a row down the center of the station while a staircase leading to a lower lever can be seen in the foreground on the left.