The third collection of "The Effect of the Gas Medium and Pressure on Body Functions" contains the results of further work-up of the problem of the effect on the body of increased and reduced total and partial pressures of various gases in ordinary air , as well as artificial gas mixtures used in deep water descents . A characteristic feature of this collection is the major place accorded to investigations on problems associated with being under conditions of increased pressure . Specifically, the majority of articles in this collection contain material on the study of caisson disease phenomena, which are among the most dangerous consequences of increased pressure on the body and for many decades have interfered with man's exploration of the deep.EXPLANATORY LIST OF ABBREVIATED NAMES OF U.S.S.R.INTRODUCTIONA. I. Aleksandrov and A. P. BrestkinTHE PERMISSIBLE SUPERSATURATION COEFFICIENTS IN HUMAN BEINGS BREATHING AIR AND A HELIUM-OXYGEN MIXTUREA.P. Brestkin RELATIONSHIP BETWEEN THE SUPERSATURATION COEFFICIENT OF GAS- LIQUID SYSTEMS AND THE TENSION OF DISSOLVED GASA.P. Brestkin , P.M. Gramenitskii, and N. Ya. SidorovSTUDY OF THE SAFE SUPERSATURATION OF THE BODY WITH INDIFFERENT GASES AT DIFFERENT PRESSURESG. L. Zal'tsman and I. D. Zinov'evaCOMPARATIVE DETERMINATIONS OF THE PERMISSIBLE SUPER SATURATION VALUE OF THE HUMAN BODY WITH INDIFFERENT GASES UNDER DIFFERENT CONDITIONSV. A. Aver'yanov SOME CONDITIONS FOR THE INCREASE IN BODY RESISTANCE TO DECOMPRESSION DISORDERS UNDER THE REPEATED EFFECTS OF DECOMPRESSIONP.M. Gramenitskii and A. A. SavichPROVOCATION OF CAISSON DISEASE SIGNS IN ANIMALS EMERGING FROM INCREASED PRESSURE BY SUBSEQUENT ASCENT TO ALTITUDEP.M. Gramenitskii and A. A. SavichRESULTS OF EXPERIMENTAL ANALYSIS OF DECOMPRESSION AIR EMBOLISMP.M. Gramenitskii, A. A. Savich, and K. S. Yurova THE EFFECT OF DIFFERENT GASES ON THE ORGANISM AFTER INTRAVENOUS ADMINISTRATIONP. M. Gramenitskii and K. S. YurovaTRAINING OF THE ORGANISM FOR ARTIFICIAL AIR EMBOLISMP.M. Gramenitskii and A. A. Savich THE ROLE OF THE HYPOXEMIC FACTOR IN DEVELOPMENT OF DECOMPRESSION DISORDERSV.A. Aver'yanov and K. S. YurovaEXPERIMENTAL AIR EMBOLISM UNDER CONDITIONS OF HYPO AND HYPERTHERMIAV.l. Arsen'eva, P.M. Gramenitskii, and K.S. Yurova COMPARATIVE CHARACTERISTICS OF RESPIRATORY AND CIRCULATORY REACTIONS OF UNANESTHETIZED DOGS TO DECOMPRESSION AND ARTIFICIAL AIR EMBOLISMV. A. Livshits SIMPLE "CALCULATED TISSUE" MODELSP.M. Gramenitskii and P.A. Sorokin THE MECHANISM OF RESPIRATORY AND CIRCULATORY CHANGES IN DOGS UNDER THE INFLUENCE OF HIGH OXYGEN PRESSURESM. A. Groshikov and P. A. Sorokin PATHOLOGICAL CHANGES IN THE LUNGS OF ANIMALS UNDER THE INFLUENCE OF HIGH OXYGEN PRESSURESP.A. Sorokin CHANGES IN THE ELECTRICAL ACTIVITY OF THE HEARTS OF ANIMALS UNDER THE INFLUENCE OF HIGH OXYGEN PRESSUREP.A. Sorokin CHANGE IN THE CIRCULATING BLOOD VOLUME IN DOGS BREATHING OXYGEN UNDER PRESSURES OF 1.0 AND 2.0 ATMOSPHERESL. I. Aruin and M. G. Ryff CHANGE IN THE ADSORPTIVE PROPERTIES OF THE NERVOUS SYSTEM AND INTERNAL ORGANS OF WHITE MICE DURING OXYGEN- INDUCED CONVULSIONSG.L. Zal'tsman , I. D. Zinov'eva, S. D. Kumanichkin, and A.V. Turygina EXPERIENCE IN THE COMPREHENSIVE STUDY OF THE CONDITION OF SOME SYSTEMS OF THE HUMAN BODY UNDER INCREASED OXYGEN PRESSUREN. Ya.Sidorov METHOD OF DETERMINING THE HEMODYNAMIC INDICES IN LONG-TERM EXPERIMENTS ON DOGS UNDER A HIGH PARTIAL PRESSURE OF OXYGEN (IN A PRESSURE CHAMBER)A. F. Panin THE BLOOD AND SPINAL FLUID SUGAR, LACTIC ACID, AND INORGANIC PHOSPHORUS IN DOGS WITH HYPEROXEMIC AND HYPOXEMIC CONVULSIONSV. N. Zvorykin THE TYPOLOGY OF HIGHER NERVOUS ACTIVITY CHARACTERISTICS IN DOGS UNDER BAROMETRIC PRESSURE CHANGESB. A. Vinokurov and Zan Dok Men THE EFFECT ON HIGHER NERVOUS ACTIVITY OF DOGS OF ACUTE HYPOXEMIA PRODUCED BY RAREFACTION OF THE ATMOSPHERE TO AN ALTITUDE OF 18,000 METERSA. A. Savich THE DEVELOPMENT OF DINITROPHENOL-INDUCED HYPERTHERMIA UNDER ALTERED PARTIAL PRESSURES OF OXYGEN AND CARBON DIOXIDET. N. Zheludkova, V. P . Zagryadskii, and Z. K. Sulimo-Samuillo THE EFFECT ON THE BODY OF A PROLONGED STAY IN A GAS MEDIUM WITH AN INCREASED CARBON DIOXIDE CONTENTB. A. Nessirio ADAPTIVE REACTION OF THE HUMAN BODY TO THE REPEATED EFFECTS OF INCREASED AIR PRESSURE (ACCORDING TO DATA ON THE STUDY OF HIGHER NERVOUS ACTIVITY)Yu. M. Polumiskov THE PROBLEM OF THE MECHANISM OF OCCURRENCE OF PULMONARY PRESSURE TRAUMA DURING THE BREATHING OF AIR AND OXYGENYu. M. Polumiskov THE PROBLEM OF THE EFFECT OF BREATHING OXYGEN IN THE RESORPTION OF GAS EMBOLISM THE VASCULAR SYSTEM OF AN ANIMAL AND ON THE COURSE OF PULMONARY PRESSURE TRAUMAYu. M. Polumiskov THE PROBLEM OF TREATMENT OF PULMONARY PRESSURE TRAUMAP. V. Oblapenko THE ROLE OF PROPRIOCEPTIVE IMPULSES FROM THE CHEST AND ABDOMINAL MUSCLES IN THE REACTIONS OF THE BODY DURING RESPIRATION UNDER INCREASED INTRAPULMONARY PRESSUREP. V. Oblapenkon THE CONDITION OF VASCULAR REFLEXES IN DOGS DURING RESPIRATION UNDER INCREASED INTRAPULMONARY PRESSUREP . V. Oblapenko THE ROLE OF THE VAGUS NERVES IN THE BODY REACTIONS DURING BREATHING UNDER INCREASED INTRAPULMONARY PRESSUREV. N. Zvorykin, A. A. Koreshkov, and P . A. Mal'kov RESPIRATORY AND CARDIOVASCULAR REFLEXES FROM GASTROINTESTINAL MECHANORECEPTORS IN BAROMETRIC PRESSURE CHANGESN. A. Afanas'ev and Z. S. Gusinskii CASE OF LATE MANIFESTATION OF INTRAPULMONARY PRESSUREZ. S. Gusinskii and A. I. ShvarevSEVERE SPINAL FORM OF DECOMPRESSION SICKNESS WITH A FAVORABLE OUTCOMEG. L. Zal'tsman , I. D. Zinov'eva, and S. D. Kumanichkin INCREASED INDIVIDUAL PREDISPOSITION OF A SUBJECT TO THE EFFECT OF HIGH PARTIAL OXYGEN PRESSURE