1. Tolerance to the behavioral effects of scopolamine in rats

   • Nicholas H. Charney
   • G. S. Reynolds

   Original Investigations Pages: 379 - 387

2. Pentobarbital and dextroamphetamine sulfate: Effects on the sleep cycle in man

   • Frederick Baekeland

   Original Investigations Pages: 388 - 396

3. The effects of amphetamines upon judgments and decisions

   • Paul M. Hurst
   • Marianna Fry Weidner
   • Robert Radlow

   Original Investigations Pages: 397 - 404

4. The effect of pilocarpine, oxotremorine and arecoline in combination with methyl-atropine or atropine on hormone activated oestrous behaviour in ovariectomized rats

   • Leif H. Lindström
   • Bengt J. Meyerson

   Original Investigations Pages: 405 - 413

5. Effects of amobarbital on discrimination acquisition and reversal

   • William F. Caul

   Short Communications Pages: 414 - 421

6. A clinical trial of a-Methyl-para-tyrosine in mentally ill patients

   • K. D. Charalampous
   • Stuart Brown

   Short Communications Pages: 422 - 429

7. Chronic reduction of cholinesterase and the extinction of an operant response

   • P. H. Glow
   • A. J. Richardson

   Short Communications Pages: 430 - 434

8. Post-criterion discrimination behavior in rats with reduced cholinesterase activity

   • A. J. Richardson
   • P. H. Glow

   Short Communications Pages: 435 - 438

9. Central catecholamine neurons and conditioned avoidance behaviour

   • Kjell Fuxe
   • Lennart C. F. Hanson

   Short Communications Pages: 439 - 447