In previous works the authors presented theories on collisions. In this paper the authors will discuss the determination of the effective cross section with exponential accuracy without the slowly varying coefficient.

The problem of establishing the laws governing the behavior of the curve of magnetic permeability have occupied many researchers. Stoletov's curve is examined in this article.

The surfaces of adsorbents are highly non-uniform, yet small portions thereof are fairly uniform and in the case of dehydrogenation-catalysts and dehydration-catalysts these constitute active centers of catalysis.

In an earlier article Krasnovskiĭ demonstrated the ability of chlorophyll to reverse photochemical reduction accompanied with the increase of free energy of the system.

The oxidation of a copper catalyst was studied by the differential thermocouple method.

The method of saponifying ethyl phenylethyl malonate using powdered caustic alkalis has the advantage of giving a good yield of the dibasic acid, and, under certain conditions, of the acid ester.

Vaporization studies were made with Po on Au, Pt and Pd supports. It was shown that Po is vaporized at a much higher temperature than from Au and Pt.

Investigations on the case of vaporization of RaD, E, and F in a vacuum were conducted.

This paper is an attempt to treat in a uniform manner the most important factors which cause spectral line broadening in gases. The main emphasis will be on the theoretical aspects of the subject, the experimental material will be treated only in connection with the theory.

After numerous attempts the author was successful in obtaining, through crystallizations from nitrobenzene, well-formed needles which are susceptible to measurement, even for the first members of the series of the salts of nickel with the glyoximes of the type (DH)2Ni.

In continuation of the x-ray study of Ni-dimethylglyoxime and Ni-methylethylglyoxime, the Patterson xy plane projection is performed, and on the basis of the vectorial values and angles thus calculated a model of molecular structure is proposed which corresponds to the exigency of the crystallographic and physical-chemical property of the examined compounds.