1. Endeavour and reality

   • K. Bucher

   Review Article Pages: 109 - 111

2. Selective effects of heterospecific antilymphocyte sera on graft and host components in Graft-versus-Host reactions

   • K. Brune
   • G. L. Floershem

   Research Reports Pages: 112 - 114

3. Induction of tolerance to skin homografts with a methylhydrazine derivative. Synergism with antilymphocytic serum and morphologic responses of the lymphoid system

   • G. L. Floersheim
   • R. N. Taub
   • R. H. Levey

   Research Reports Pages: 115 - 123

4. The effect of prostaglandin E₁ and bradykinin on normal and depolarized isolated duodenum of the rat

   • R. K. Türker
   • A. Özer

   Research Reports Pages: 124 - 127

5. Differentiation of receptors for exogenous and endogenous acetylcholine in the urinary bladder

   • G. B. Chesher

   Research Reports Pages: 128 - 132

6. Resistance to picrotoxin poisoning induced by catatoxic steroids

   • Hans Selye

   Research Reports Pages: 133 - 135

7. Effect of an extract of cannabis and of some cannabinols on catecholamine metabolism in rat brain and heart

   • L. Maître
   • M. Staehelin
   • H. J. Bein

   Research Reports Pages: 136 - 143

8. Age and sex differences in mast cell count and histamine content

   • R. Jaques
   • M. Rüegg

   Research Reports Pages: 144 - 147

9. Notes and documents concerning the discovery of LSD

   • A. Hofmann

   Singularities Pages: 148 - 150

10. Scientific autographs-III

    • H. M. Koelbing

    Historical Note Pages: 151 - 154