G. Büki: Making use of the energy set free in the Earth's interior A. Holl: About the free and long lasting access to scientific papers and data J. Rékai: Addenda to the history of inventing the transistor TEACHING PHYSICS L. Wiedemann: Problem solving in physics I. Bartos-Elekes: Experiments performed in the Ady Endre Lyceum (Nagyvárad) when free fall is taught J. Vida: Exciting final phase of the "Magic Tower" competition J. Jaloveczki: Physical demonstration experiments OPINIONS S. Egyed: Where does metaphysics "come in"? EVENTS