A data set from Oehlert (2000) \emph{A First Course in Design and
Analysis of Experiments}, New York: W. H. Freeman.

Data originally from Caro, M.~R., E.~Zamora, L.~Leon, F.~Cuello,
J.~Salinas, D.~Megias, M.~J. Cubero, and A.~Contreras (1990).
``Isolation and identification of {\em Listeria monocytogenes\/}
in vegetable byproduct silages containing preservative additives
and destined for animal feeding.'' {\em Animal Feed Science and
Technology\/}~{\em 31}, 285--291.

Moisture content of orange pulp silage subjected to
four treatments.  Column 1 is treatment (1 through 4
indicates NaCl, formic acid, beet pulp, and control).
Column 2 is moisture content.