Found this subject only recently. Very interesting.
I would like to see photos of material transfer cars (carts) etc that were used apparently in a lot of large production facilities, like grain, steel, coal etc.
These cars were usually I believe 'home built' and featured a standard railroad hopper powered by air, gas, electric,( or similar) with a cab on one end for driver to sit. Short distances only traveled by rail around the facility.
Have not managed to locate many photos of such equipment. Any photos available especially in the mid west including TX.