Abstract
In the abstract of the paper, "The Direct Observation of Hapten-Antibody Equilibria" presented before the National Academy of Sciences, which was published in the Nov. 13th issue of SCIENCE, p. 570, there isan error due to a miscalculation. A value of 5.5 kcal isgiven for the free energy of formation (per mole) of ahapten-antibody bond. This value should be 7.6 kcal.
