Abstract
The following list comprises a selected number of measurements made during 1966–67 with CH4 at 3 atm pressure in a 0.6 L proportional gas-counter as previously described. The B.P. ages are based upon a.d. 1950 and are calculated with a half-life of 5570 yr. The quoted error consists of experimental standard deviation including the counting variations of the unknown sample, the modern standard, and the background.