Differentiation between receptors for serotonin and tryptamine by means of the exquisite specificity of antimetabolites.

I. Effects of Reserpine and Hydralazine on Carotid and Splanchnic Nerve Activity and Blood Pressure. A. S. Dontas 1 II. Action and Metabolism of Chiorpromazine Sulfoxide in Man. John C. Davidson, Luther L. Terry and Albert Sjoerdsma 8 III. Differentiation Between Receptors for Serotonin and Tryptamine by Means of the Exquisite Specificity of Antimetabolites. D. W. Woolley andE.Shaw 13 IV. A Quantitative Study of the Action of Synthetic Oxytocin on the Pregnant Human Uterus. R. Caldeyro-Barcia, Y. Sica-Blanco, J. J. Poseiro, V. Gonz#{225}lez-Panizza, C. M#{233}ndez-Bauer, C. Fielitz, H. Alvarez, S. V. Pose and C. H. Hendricks 18 V. Studies on Substituted Dithiooxamides, Diphosphopyridine Nucleotidelinked Dehydrogenase Inhibitors. I. General Toxicity and Site of Action. James G. Miller, Maynard B. Chenoweth and Theodore M. Brody.. 32 VI. Studies on Substituted Dithiooxamides, Diphosphopyridine Nucleotidelinked Dehydrogenase Inhibitors. II. On the Mechanism of Action. James G. Miller and Theodore M. Brody 43 VII. Secretion of DDT Metabolites in the Bile of Rats. Edward G. Burns, Paul A. Dahm and Donald A. Lindquist 55 VIII. The Physiological Disposition of Oxyphenonium Bromide (Antrenyl) and Related Compounds. Ruth Mitchell Levine and Byron B. Clark... 63 IX. The Effect of Atropine and Morphine on Respiration. Stuart S. Steinberg, J. Weldon Beilville and John C. Seed 71 X. The Topical Action of Morphine, Levorphanol (Levorphan) and the Morphine Antagonist Levallorphan on the Unanesthetized Rabbit’s Brain. H. Gangloff and Marcel Monnier 78 XI. Marked Potentiation in Mammalian Toxicity from Simultaneous Administration of Two Anticholinesterase Compounds. John P. Frawley, Henry N. Fuyat, Ernest C. Hagan, Jane R. Blake and 0. Garth Fitzhugh 96 XII. The Inhibitory Action of Nalorphine on the Enzymatic N-Demethylation of Narcotic Drugs. Julius Axeirod and Joseph Cochin 107 XIII. Some Pharmacologic Properties of a New Series of Cholinesterase Inhibitors. W. J. Fleming, J. P. Long, R. J. Wuif and R. M. Featherstone. 113 XIV. Metabolic Disposition of Ethyl Trichioramate. Anthony J. Glazko, Wesley A. Dill, Loretta M. Wolf and Anna Kazenko 119 XV. Interaction of Serotonin and Lysergic Acid Diethylamide in the Siamese Fighting Fish. David L. Trout 130 XVI. The Depressant Action of Ethyl Trichloramate on the Central Nervous System. Graham Chen, Charles R. Ensor and Barbara Bohner 136 XVII. Effects of Chiorpromazine on the Acquisition and Extinction of an Avoidance Response in the Rat. Robert Ader and Daniel W. Clink 144