Lillian Eichler Watson,
Book of Etiquette, Volume II
“ This may seem superfluous in a book of etiquette, but it is surprising how many otherwise cultured men stamp noisily or whistle when something said or done upon the stage particularly pleases them.Ill-timed or continual applause is disturbing to performers and audience alike. Indiscriminate hand-clapping is not only annoying, but reflects poor judgment upon the offender. When you feel that an actor or lecturer merits applause, give him a short and hearty hand-clapping, but do not make the mistake of clapping noisily and excessively each time the opportunity presents itself. ”
