The proper name for the toidy

Those "Track Dump Toilets" proper name is a "Dry Hopper".
They were used (by the C&NW) on some cabooses up until cabooses were discontinued. Most modern cabooses used the Microphor arrangement. These had a retention tank with bugs (bacteria) with a taste for.. umm.... waste? It was not unusual to hear that the cabooses needed some more "s--t eating bugs".
Dry hoppers were used by most early railroads. I have seen examples of this fine and highly efficent waste disposal system on C&S passenger cars, D&RG cars and NP (aka Ski-Train) cars.
As far as the locomotive crew went, there was the "hanging the moon off the deck" technique. There was the "Pee in the hole in the corner where the water jacket meets the coal door (or sand box on oil burners)" technique. The most effective was the "Deposit the solid waste on the scoop shovel" technique. After a few scoops, all evidence was destroyed.
The only thing is that you have to bring your own paper (or is that why Train Orders so resemble tissue?).
Rick Steele