1. Experimental studies on the origin of the genetic code and the process of protein synthesis: A review update

   • James C. Lacey Jr.
   • Nalinie S. M. D. Wickramasinghe
   • Gary W. Cook

   ReviewPaper Pages: 243 - 275

2. An efficient lightning energy source on the early earth

   • R. D. Hill

   OriginalPaper Pages: 277 - 285

3. Comet Halley as an aggregate of interstellar dust and further evidence for the photochemical formation of organics in the interstellar medium

   • R. Briggs
   • G. Ertem
   • W. Schutte

   OriginalPaper Pages: 287 - 307

4. The evolution of aminoacyl-tRNA synthetases, the biosynthetic pathways of amino acids and the genetic code

   • Massimo Di Giulio

   OriginalPaper Pages: 309 - 319

5. Book review

   • Barry L. Lutz
   • Susan Hoban

   BookReview Pages: 321 - 329

6. ISSOL '93

   Announcement Pages: 331 - 331