Schlitz employees wear masks while unloading grain-filled boxcars. Grain fell from the boxcars through floor gratings into conveyors that lifted the grain into elevators for storage. Before covered hopper cars were developed, the Milwaukee Road used paper doors on converted boxcars to haul grain. Made with reinforced, heavy paper, the doors acted as liners to prevent grain from spilling out of standard boxcar doorways. Shippers paid for the paper doors and installed them before loading. Abbey-01-084-08