| [2] | Contents. |
| 3-9 | Ein Beitrag zur Theorie der zylindrischen Luftspalte in einem Reaktor. Čermák, J.; Zezula, R. |
| 11-24 | Photochemical changes of chlorophyll $\alpha$ as reflected in absorption spectra. Kaplanová, M. |
| 25-37 | Regular mappings of groupoids. Kepka, Tomáš |
| 39-49 | T-quasigroups (Part I.). Němec, P.; Kepka, Tomáš |
| 51-54 | Functions satisfying an integral Lipschitz condition. Král, J. |
| 55-63 | Lattice socles and radicals described by a Galois connnection. Beran, L. |
| 65 | A note on the spectrum of Comet Kohoutek 1970 III. Bouška, J.; Mrkos, A. |
| 67-78 | Observations of comets and asteroids at the Kleť Observatory in the year 1970. Mrkos, A. |