But in the railway carriage they don't allow you to be mad.

In Europe, unless you are prepared to draw at sight upon the other passengers, throw the conductor out of the window, and take the train in by yourself, it is useless arguing the question of fresh air.

The rule abroad is that if any one man objects to the window being open, the window remains closed.

He does not quarrel with you: he rings the bell, and points out to the conductor that the temperature of the carriage has sunk to little more than ninety degrees, Fahrenheit.

He thinks a window must be open.
The conductor is generally an old soldier: he understands being shot, he understands being thrown out of window, but not the laws of sanitation.
If, as I have explained, you shoot him, or throw him out on the permanent way, that convinces him.