This list reports routine measurements made at thislaboratory since the preparation of Texas IV.Samples numbered through Tx-309 were counted underthe supervision of Pearson, who left the laboratoryearly in 1966. Valastro, Associate Director sinceAugust, 1966, is responsible for samples beginningwith Tx-310. Laboratory administration and samplescreening have been handled by Davis, M. A. Tamers,formerly Director, resigned in 1966.