The data set Iron contains data from Draper and Smith (p. 98). (footnote 1)

data iron;
   input Fe Loss @@;
   datalines;
0.01 127.6   0.48 124.0   0.71 110.8   0.95 103.9
1.19 101.5   0.01 130.1   0.48 122.0   1.44  92.3
0.71 113.1   1.96  83.7   0.01 128.0   1.44  91.4
1.96  86.2
;

FOOTNOTE 1:  Draper, N. and Smith, H. (1998), Applied Regression Analysis, Second Edition, New York: John Wiley & Sons.