History: The Ingenues, an all-girl band and vaudeville act, serenade the cows in the University of Wisconsin, part of an experiment to see whether the soothing strains of music boosted the cows' milk production (1930) [3000 x 1685]

http://i.imgur.com/7gV9JFI.jpg via /r/HistoryPorn http://www.reddit.com/r/HistoryPorn/comments/3i28we/the_ingenues_an_allgirl_band_and_vaudeville_act/