Egg shell and albumen quality at the age of 34 weeks were measured over a period of 6 years in a closed White Leghorn flock selected for increased half-year egg production. Heritabilities estimated from the sire plus dam components were: albumen height, .48 ± .07; Haugh units, .40 ± .06; specific gravity score, .43 ± .06; and shell thickness, .37 ± .06. Estimates from the sire component were consistently higher than estimates from the dam component. Heritabilities of measurements at the age of 57 weeks were lower than at 34 weeks, but the genetic correlations between measurements at these two ages were .7 and .8. With repeatabilities ranging from .50 to .58 for these traits, 7 to 9 eggs/pullet would be required for an accuracy of measurement of .90. The shell and albumen quality traits had genetic correlations of the order of .10 with sexual maturity, −.20 with egg production, and .10 with egg weight. Specific gravity score measured with the flotation method had a genetic correlation of .87 ± .03 with shell thickness.Ten generations after a genetic control line was established from the selection line, the average differences between these two lines remained relatively stable over a period of 6 years and were: half-year egg production, 28.1 eggs, albumen height −.54, Haugh units −2.22, specific gravity score −.62, and shell thickness −2.22 × .01 mm. The genetic correlations between half-year egg production and egg quality traits calculated from the direct and correlated selection responses were: albumen height −.41, Haugh units −.25, specific gravity score −.29, and shell thickness −.51. The average correlated selection differentials over 5 years were: albumen height −.07 mm, Haught units −.52, specific gravity score −.06, and egg shell thickness −.2 × .01 mm. It is suggested that small selection pressures for these traits would maintain their original levels.