The chief engineer had many phones. It’s my guess one connects to the pilot house and the other connects to the emergency steerage station that’s mid-deck.
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Jars like these were used to measure the volume of fluid pumped out of TB patients’ lungs.
Employee lockers near the stage, Service Building.
Without a roof, the bricks were being washed away in the later years of the roundhouse.
A long exposure in the wind, lit by airport lights.
Chutes from a hundred machines interconnect to more machines and chutes on a dozen factory floors.
A lime auger and massive feet of the lime hopper.
The nitrating house was a chemically dangerous place, so it had thick metal and concrete shield for every station right next to an emergency shower.
The ADM Quality Assurance Labs haven’t changed much, except for that it has become a common home for the homeless.
One of the many blast doors. Note the plunger to seal off the airflow in the event of an attack or accidental explosion.