Four stops later, she rose and tucked the book away, wading through the throngs of people to the door as the train slowed.
If the coin is light the rod S fits into the uppermost step and the shoot stops over the right-hand slot.
If the coin is heavy, S fits into the lowest step and the shoot stops over the left-hand slot.
The machine can be set to deliver a certain number of coins, after which the counting wheel stops automatically.