Articles

Calibration of Precision Airplane Mapping Cameras
Francis E. Washer and Frank A. Case

A Permeameter for Magnetic Testing at Magnetizing Forces up to 300 Oersteds
Raymond L. Sanford and Philip H. Winter

Heat Capacity of Sodium Between 0° and 900° C, the Triple Point and Heat of Fusion
Defoe C. Ginnings, Thomas B. Douglas, and Anne F. Ball

High-Temperature X-Ray Study of the System Fe₃O₄-Mn₃O₄
H. F. McMurdie, Barbara M. Sullivan, and Floyd A. Mauer

A Quantitative Study of the Carbon Monoxide Formed During the Absorption of Oxygen by Alkaline Pyrogallol
Marthada V. Kilday

Tracing of Skew Rays
Donald P. Feder

Strength of Heat-Resistant Laminated Plastics up to 300° C
Benjamin M. Axilrod and Martha A. Sherman

Attenuation of Oscillatory Pressures in Instrument Lines
Arthur S. Iberall