1. Some remarks on science by a litterateur

   • John Dos Passos

   Editorial Pages: 143 - 144

2. Forebrain mechanisms related to internal inhibition and sleep

   • Carmine D. Clemente

   OriginalPaper Pages: 145 - 174

3. Differential pavlovian fear conditioning as a function of the qualitative nature of the UCS: Constant versus pulsating shock

   • J. Bruce Overmier

   OriginalPaper Pages: 175 - 180

4. Exploring the brain with drugs

   • Amedeo S. Mabrazzi

   OriginalPaper Pages: 181 - 188

5. The effects of atropine on viscerovisceral reactions and the electrocardiogram of the cat

   • M. Lindemann
   • W. Rüdinger
   • K. -Ch. Bergmann

   OriginalPaper Pages: 189 - 199

6. Two methods for obtaining electrocardiograms of chair-restrained monkeys

   • Douglas A. Ramsay
   • Ovide F. Pomerleau
   • Arthur G. Snapper

   OriginalPaper Pages: 200 - 204