From abstract: "This project was a study of electrostatic classification of submicron aerosols. Classification of particles as small as 0.006-[mu]-diameter was shown to be feasible, and good classification of atmospheric dust was achieved. However, a practical solution to the problem of overlapping between particles larger and smaller than 0.1 [mu], the point of minimum electric mobility, was not found."

The following quarterly progress report covers the period from November 16, 1962 to February 15, 1963. This report summarizes three activities that study the ratio of the maximum absorption of the K band to the maximum absorption of the F band has been made in additively colored and [gamma]-irradiated rubidium chloride.

The following quarterly report covers the period during February 16 to May 15, 1963. This report is divided into sections covering the separate activities during this period, studying the thermal behavior of the F-center in RbCl.

This report discusses many low energy neutron capture gamma ray spectra from many elements. Also, a series of neutron capture gamma ray spectra from a wide variety of meteorite and terrestrial rock samples were obtained.

A report focused on obtaining further neutron capture gamma ray spectra for inclusion in the Atlas, and in conducting subsidiary experiments to determine the cause of the anomalous broad peak structure which was reported in ARF 1193-20.