Erratum.
In the reply to the technical comments of E. H. Hall and E. A. C. Crouch by J. L. McNichols, Jr., et al. (13 June, p. 1293), the last sentence of the second paragraph was printed incorrectly. It should have read, "We maintain that f depends on the system design and is not limited by fundamental thermodynamic considerations to 1/20 [the value obtained by Hall for the Ocean Thermal Energy Conversion (OTEC) Rankine system]. However, the OTEC Rankine system does provide a baseline...."