--- In STMFC@..., Denny Anspach <danspach@...> wrote:
...If these grain cars carried coal, then how did they block the doors- "grain doors" again? Although I would suspect that coal is actually relatively "clean", I would also presume that a car that carried coal would have had to be thoroughly cleaned to a certain level of cleanliness to then carry grain again. If so, how did that work?
Most likely a broom. After all, the cars were carrying GRAIN, not flour. Considering that the FDA has written specifications for the maximum amount of insect parts allowable in milled cereal grain, I don't see where a little coal dust would be a problem :-)
