1. What is quantum logic?

   • Sławomir Bugajski

   OriginalPaper Pages: 311 - 316

2. A categorical approach to polyadic algebras

   • Roch Ouellet

   OriginalPaper Pages: 317 - 327

3. Logical matrices and the amalgamation property

   • Janusz Czelakowski

   OriginalPaper Pages: 329 - 341

4. Another proof that ISP _r(K) is the least quasivariety containing K

   • Janusz Czelakowski
   • Wiesław Dziobiak

   OriginalPaper Pages: 343 - 345

5. The finite inseparability of the first-order theory of diagonalisable algebras

   • Craig Smoryński

   OriginalPaper Pages: 347 - 349

6. ∑ ₀ ⁿ -equivalence relations

   • Andrea Sorbi

   OriginalPaper Pages: 351 - 358

7. Adjoint interpretations of sentential calculi

   • Tomasz Fukmanowski

   OriginalPaper Pages: 359 - 374

8. That SCI has the interpolation property

   • Grzegorz Malinowski
   • Marek Michalczyk

   OriginalPaper Pages: 375 - 380

9. A formal ontology of situations

   • Bogusław Wolniewicz

   OriginalPaper Pages: 381 - 413

10. Concerning axiomatizability of the quasivariety generated by a finite Heyting or topological Boolean algebra

    • Wlesław Dziobiak

    OriginalPaper Pages: 415 - 428

11. Books received

    • Leszek Pacholsk
    • Ewa Capińska
    • Ryszard Wójcicki

    BookReview Pages: 429 - 437