Summary

Portrait of Lillian Eichler Lillian Eichler Book of Etiquette, Volume 2, Part 4… (1921)

Everyone knows that tipping is a European custom and is entirely un-American in principle. But while the custom is observed as widely in this country as it is to-day, it is both inconsiderate and bad form to ignore it. The wages of waiters and waitresses, porters and hotel servants are outrageously small, for the reason that they receive tips for each service they perform for individual guests and travelers.
Source: Wikisource

Portrait of Lillian Eichler Lillian Eichler Book of Etiquette, Volume 2, Part 4… (1921)

In the dining-car a tip of twenty-five cents is sufficient for the services rendered a man or woman. The woman who travels alone may leave twenty-five cents for the waiter in the dining-car. The man who travels alone should leave ten per cent, of the bill, or more according to the services received.
The woman who travels with children and stops at a hotel dining-room or a restaurant along the route, for dinner, should remember that children always require extra service and trouble, and the waiter or waitress should be tipped accordingly.
Source: Wikisource

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