Bromo-seltzer

"Wait a minute." Ida, with bedroom slippers clattering, hurried back to her room, returned with a bottle of bromo seltzer and in the bathroom fixed Susan a dose. "You'll feel all right in half an hour or so. Gee, but you're swell—with your own bathroom."

He heard Carling addressing a remark to the bartender: “Give him a bromo-seltzer.” Amory shook his head indignantly. “None that stuff!”