A data set from Oehlert (2000) \emph{A First Course in Design and Analysis of Experiments}, New York: W. H. Freeman. Data originally from Kurotori, I.~S. (1966). ``Experiments with mixtures of components having lower bounds.'' {\em Industrial Quality Control\/}, May, 592--596. Columns are proportions of binder, oxidizer, and fuel and response (elasticity).