On June 14, 1950, an aluminum Kanne Chamber on the 108-B vacuum discharge line was placed in operation. The vacuum pump discharge line chamber has a very poor reputation for two reasons: 1. An apparent hysteresis effect which shows as a high reading after a slug of gas has passed through it, and 2. Failure to return to background current. Cause of the hysteresis effect may be the distribution of tritium in the vacuum pump discharge gas. The rate of gas flow through the Kanne chamber is approximately ten cubic feet per minute. In order to determine steps necessary to eliminate chamber contamination, the existence of contamination must first be definitely established by measuring chamber background with an uncontaminated air filling at intervals during routine use. Monitor chamber currents are now recorded on a multiple point recorder with a cycle time of approximately four minutes, a long wait which is annoying and may mask transient phenomena almost completely. The following steps are recommended to facilitate the necessary stack gas measurements: 1. Provide clean air flushing facilities for both Kanne chambers on the vacuum pump discharge line. 2. Replace existing recorder with continuous recording facilities for each point.

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Report presenting a theoretical analysis of the air flow through the blade coolant passages in an air-cooled turbine rotor. The simultaneous effects of area change, compressibility, wall friction, heat transfer, and rotation were included.

Report presenting the application of an estimation of the derivative of yawing moment due to rolling to the dynamic lateral stability characteristics of the Bell X-2. Results regarding the airplane with flaps and gear retracted and airplane with flaps and gear lowered are provided.

This report describes contamination in the 100, 200, and 300 areas at Hanford in 1956.