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A technique is described whereby an assessment of the extent of reaction at any time and at any selected depth beneath the surface of a solid film is obtained from infrared spectrophotometric data. The resultant reaction profiles can be used to investigate the kinetics in planes normal to the surface. Group concentration–time curves can be constructed for planes at selected depths parallel to the surface and used to assess the kinetics in such planes. As a result it is possible to study realistically reactions which do not occur homogeneously throughout a solid, e.g., those effected by oxidation, irradiation, plasma treatment, etc.

Plasma torch treatments of track rails to improve locomotive wheel traction were investigated as a potential substitute for rail sanding. Rolling friction tests were conducted under simulated rail-wheel load conditions at about 200,000 psi contact stress. Although traction was improved significantly in laboratory tests, total power required to significantly improve the coefficient of friction for a diesel electric operation at low speeds appears excessive. Power required at 80 mph is prohibitive. Moreover, safety, maintenance, and mechanical aspects require a considerable amount of further development before such an application can be considered possible on American railroads.

1.1. A report is presented of a case of severe, near-fatal anaphylactic shock of "exudative" type (excessive blood volume loss). 2.2. The intravenous use of plasma, now increasingly available, may prove to be a specific treatment for this alarming condition. It should be tried early and in adequate amounts.