From The Boy on the Farm, and Other Narratives in Verse by Murray Whiting Ferris (New York, 1916), page 104:

When on the train, you first take off your coat and then your collar,
Dine at a Chinese restaurant; get lunch for half a dollar.
To your surprise you are refreshed by what you eat and drink,
You get your fill of sundry foods, and then you tip the “Chink.”

From The Girl Scout Pioneers; Or, Winning the First B.C. by Lillian C. Garis (New York, 1920), page 140:

"Wasn't it funny how we all laughed on the question of earning fifty cents," remarked Jeanette. "Looked as if we thought earning money was a big joke."

"No, that wasn't it, Jean," corrected Dora. "It was making it fifty cents. Why, that wouldn't tip the 'chink' who irons our shirtwaists," and the original laugh was encored.