Personalia.

Anniversaries. In 1920: the 70th anniversary of E. Goldstein; 25 years since the discovery of X-rays; 100 years since Oersted’s discovery of the action of an electric current on a magnetic needle. In 1921: 100 years since the birth of H. v. Helmholtz.

Elected: as Professor of the Petrograd University in the Chair of Theoretical Physics—Yu. A. Krutkov; as Professor of Physics at the Petrograd Electrotechnical Institute—M. M. Glagolev; as Professors of Physics at the Petrograd Technological Institute—N. N. Georgievsky and V. I. Pavlov; as Professor in the Chair of Theoretical Physics of the Petrograd First Pedagogical Institute—V. K. Frederiks; as Professor of the same Institute in the Chair of Experimental Physics—A. P. Afanas’ev; as Professor of Physics at the Moscow Economic Institute named after K. Marx (formerly the Moscow Commercial Institute)—V. K. Arkad’ev.

A new composition of the presidium of the Physics Division of the Russian Physico-Chemical Society has been elected: chairman—V. R. Bursian, deputy chairman—Yu. A. Krutkov, secretary—V. K. Frederiks, deputy secretary—P. I. Lukirsky, treasurer—A. A. Mähne, editor of the journal of the R. Ph.-Ch. S.—N. N. Georgievsky, librarian—A. A. Lebedev.

A new composition of the presidium of the Physics Division of the Society of Lovers of Natural Science, Anthropology, and Ethnography in Moscow has been elected: chairman—P. P. Lazarev, deputy chairman—A. P. Sokolov, secretary—T. K. Molodyi.

Deceased: S. Ya. Tereshin—Professor of the Military Medical Academy in Petrograd; N. P. Metel’skii—Prof. of the Moscow Institute of Railway Engineers. N. E. Zhukovskii—Professor of Moscow University; L. S. Kolovrat-Cherninskii—Director of the Radiological Department of the State X-Ray and Radiological Institute in Petrograd.