Belgium (Continued) Part 4. Skin and depth doses during diagnostic X-ray procedures. Part 5. General discussion of the need for methods of effective dose reduction in diagnostic X-ray procedures. Parts 6and 7. Chemical protection (a) metabolism of cystamine and (b) the effectiveness and toxicity of cystamine. Part 8. Experiments on the ascorbic acid and cholesterol content of the suprarenals of the rat following irradiation of normal and hypophysectomised ‘animals. G/R.116 REPORT ON HEALTH PROTECTION IN URANIUM MINING OPERATIONS IN KATANGA G/R.119 EFFECT OF A LETHAL DOSE OF RADIATION ON THE AMOUNT OF REDUCING STEROIDS IN THE BLOOD OF THE RAT { Indicates that lethal irradiation shows, in the blood, an increase of reducing steroids. This reaction presents a maximum which is not necessarily linked to the variations of the supra ascorbic acid and renal cholesterol. G/R.120 ACTION OF HYDROGEN PEROXIDE ON THE GROWTH OF YOUNG BARLEY PLANTS The growth of ocleoptiles of young barley plants treated with hydrogen peroxide is affected in the same way as when the plants are irradiated with X-rays. G/R.121 ACTION OF CYSTAMINE AND GLUTATHIONE ON X-RAY IRRADIATED BARLEY SEED The cystamine and glutathione diminish the effects of X-rays on barley grains; mitosis are still possible after doses which would inhibit them in the absence of these agents. G/R.122 ACTION OF X-RAYS ON THE GROWTH OF INTERNODAL CELLS OF THE ALGA CHARA VULGARIS L. Irradiation of internodal cells of alga Chara Vulgaris L. increases the elongation of these cells for doses up to 150 kr; above this dosage elongation is inhibited. c.f. G/R.156. , G/R.155 RECENT RESEARCH ON THE CHEMICAL PROTECTORS AND PARTICULARLY ON CYSTEAMINE-CYSTAMINE Discusses the possible mechanisms of action of chemical radioprotectors particularly of those above-mentioned. G/R.156 EFFECT OF X-RAYS ON THE GROWTH OF INTERNODAL CELLS OF THE ALGA CHARA VULGARIS L. A complicated dose-effect relationship is shown when nondividing internodal cells are irradiated and their growth tested. c.f. G/R.122. G/R.158 THE ACTION OF VARIOUS DRUGS ON THE SUPRARENAL RESPONSE OF THE RAT TO TOTAL BODY X-IRRADIATION Describes strict difference in action of radioprotectors (cysteamine) or narcotic drugs (morphine and barbiturate) in preventing adrenal changes of irradiated animals. G/R.159 NERVOUS CONTROL OF THE REACTION OF ANTERIOR HYPOPHYSIS TO XIRRADIATION AS STUDIED IN GRAFTED AND NEWBORN RATS Indicates that the changes of suprarenals after irradiation are consequence of a neuro-humoral chain reaction. The reaction of adrenals seems to have negli- gible importance in the pathogenesis of radiation disease. G/R.209 RADIOACTIVE FALLOUT MEASURED AT THE CEN DURING 1955-56 AND 57 Describes methods and results of fallout measurements in the period 1955-57. 176 Beste: