CORRECTION

In the article by A. A. Pirogova and A. I. Kovalev, “Electron-microscopic study of the influence of surface-active additives on the hydration of periclase,” published in Doklady Akademii Nauk, vol. 125, no. 4, 1959, the captions to the figures on p. 857 should read:

Caption to the 1st row of figures: Hydration of finely dispersed periclase in a solution of MgSO₄ after 3 days (a), 28 days (b), 60 days (c). 10000×.

Caption to the 3rd row of figures: Hydration of finely dispersed periclase in distilled water after 3 days (a), 28 days (b), 155 days (c). 10000×.

Caption to the 4th row of figures: Hydration of finely dispersed periclase in a solution of MgCl₂ after 3 days (a), 28 days (b), 60 days (c). 10000×.

In the article by K. G. Bagdasaryan, “On the question of studying the mollusk fauna of the Chokrakian horizon of Georgia,” published in Doklady Akademii Nauk, vol. 128, no. 5, 1959, on p. 1019 the name of the institute should read: Institute of Paleobiology of the Academy of Sciences of the Georgian SSR.