Slids

through the litter of songs with which recent decades are strewn, we have been able to see the gradual decline in the popular song supply. Sentiment has been turned into sensuous suggestion. Romance has been turned into eroticism. The popular lilt slid into ragtime, and ragtime has been superseded by jazz. Song topics became lower and lower until at last they were dredges ofthe slimy bottom of the underworld. The first self-styled "King of Jazz" was a Jew named "Frisco." The general directors of

observation. If all treatment means are equal, the observed means yi. would behave as if they were a set of observations drawn at random from a normal distribution with mean and standard deviation 1n. Visualize this normal distribution capable of being slid along an axis below which the treatment means y1., y2., p , ya. are plotted. If all treatment means are equal, there should be some position for this distribution that makes it obvious that the yi. values were drawn from the same…