1 Introduction.- 2 A simple factorial grazing experiment measured on 27 occasions.- 3 A 3 ? 3 factorial with quantitative levels.- 4 Definable within-individual comparisons.- 5 Covariance.- 6 Pre-treatment observations in the design of experiments.- 7 Weighted regression, goodness-of-fit and related topics.- 8 Environmental variables.- 9 Correlation between series of random variables.- 10 Response (reaction) times.- Bibliographical note.