A new measurement of the ratio of the CP-violating amplitudes for K → 2π and K → π π is reported. The measured value for R = {divides}η /η {divides} is 0.9878±0.0026±0.0030, where the first error is the statistical uncertainty and the second is the estimate of the systematic uncertainty. This gives a value for the parameter describing direct CP violation: Re ε{lunate}'/ε{lunate} = (2.0 ± 0.7) × 10 . © 1993. L L 00 +- 0 + - 2 -3