To commemorate the fortieth anniversary of the Great October Socialist Revolution, the research staff of the Kazakhstan Hydrometeorological Research Institute completed a series of scientific studies intended to address the most urgent problems involved in providing hydrometeorological services to the national economy of the republic. Some of the materials contained in the published papers have already been applied in the work of ministries and agencies of the Kazakh Soviet Socialist Republic. This collection includes the following studies: A Brief Agroclimatic Characterization of the Natural-Economic Regions of the Kazakh Soviet Socialist Republic. This work, prepared by a team of authors under the direction of A. P. Fedoseyev, contains data and generalizations concerning the natural climatic conditions of the Kazakh SSR, which are essential for developing systems of crop cultivation and livestock management within the republic. Precipitation Conditions in Alma-Ata. The article by Z. D. Kreykova presents precipitation data for the Alma-Ata region and their analysis, describing conditions on the northern slopes of the Trans-Ili Alatau. The study has practical significance for determining the proper balance between irrigated and dryland agriculture, as well as for the development of horticulture, viticulture, and other crops across different altitudinal zones. Prevention of Mudflow Formation in Glaciated Regions. The article by S. P. Kavetsky and A. V. Vegistne examines the conditions under which catastrophic mudflows occur in the Malaya Almatinka River basin during periods of intense glacier melting, along with methods for preventing mudflow floods and reducing their destructive effects. The Formation and Dynamics of Mudflows. In his article, I. P. Smirnov proposes a method for determining the bulk density of mudflows. Analysis and Forecasting of the Seasonal Snow Line. V. I. Korovin presents the relevant characteristics that make it possible to formulate snow-line forecasts. Problems in Snow-Cover Research (articles by I. I. Prokhorov and Ye. A. Melnikova). The first article critically reviews existing methodological guidelines and provides recommendations for measuring snow depth. The second discusses methods for assessing snow reserves remaining in mountainous regions at the end of winter. An Approximate Quantitative Method for Estimating Suspended-Sediment Transport in Unstudied and Poorly Studied Rivers of the Central Kazakhstan Uplands (article by P. F. Lavrentyev). General Characteristics of the River Network of Kazakhstan and Its Total Length (article by F. V. Shkalikov). Meteorological and Topographic Conditions for Fog Formation. The article identifies the influence of frontal dissipation processes and atmospheric subsidence on fog formation and provides forecasting indicators. This work was carried out jointly by several aviation meteorological stations under the direction of T. A. Durgetova. A Method for Forecasting Thunderstorms Based on Upper-Air Observation Data. R. S. Golubov presents examples of forecasts in his article. The Relationship Between Drought Phenomena in Ukraine and Kazakhstan (article by M. Kh. Baidara and A. S. Uteshev). Atmospheric Humidity Forecasting Based on the Studies of Belyaev and Marchuk. In his article, Ye. D. Shekhtman attempts to construct a numerical scheme for such forecasts. Conditions for the Development of Atmospheric Turbulence Causing Aircraft Bumping and Turbulence During Flight (article by N. F. Gelmgolts). The Photochemical Theory of Atmospheric Ozone Based on Unique Data Obtained During the Total Solar Eclipses of 1952 and 1954 (article by Sh. A. Bezverkhny). An Original Design of an Automatic Accelerometer. The article by L. Ye. Suslov provides a brief description of this accelerometer.