U. S. Geological Survey radiocarbon dates, [Part] 5.

Abstract

The dates listed herein have been determined at the U.S. Geological Survey radiocarbon laboratory at Washington, D.C., since the last date list (U.S.G.S. IV, 1958) and up to the end of 1959. Acetylene continues to be the gas chosen. Each sample is run for a period of 2 days in 2 separate counters with separate electronics. The modern standard used is wood grown in the 19th century, and the ages and errors have been computed in the same manner as before. Pretreatment of wood, charcoal, and peat samples by boiling in acid, alkali, and acid again, is standard procedure.