January, page 67—several labels were inadvertently left off the figures in “Kinetic theory of fluids–an introduction” by E. G. D. Cohen. In part a the lower tree is number 2, the upper is number 3. In part b, the unlabeled tree is number 2. In parts b and c the wind particle 1 hits tree 2 at two points: The upper point is B, the lower point is A. In part c the point where wind particle 1 hits tree 2 is again point A. On page 69 the figure should have indicated that the decrease in amplitude of the sound modes takes place while they propagate away from the disturbance.