LIDICKER 1981 Sept. 6 cont. Dunroack - Haugesund - st Pinsk: kangaroo also saw a large Viper Returned to Pinsk; kept for dinner + discussions, watched news on TV. Jan called in too late on article = Bolint & Petersenig. Took bus back to hotel, arriving ~ 22:15. Sept. 7 At 0900 K. Andrzujewska arrived to take me to the Instytut Ekologii i Dziewkarów Lesny. She wanted to show me how to get there on the buses in case I missed the instytut bus at 08:00. We arrived after 10:00. Had much discussion about my plans + arrangements. Also good talk with K. Petersenig who has anthyemia, & has been in hospital. He came to Inst. to attend meeting of collegium (administers of inst. + heads of departs.). Petersenig remains mentally very sharp, his English is a good enough, and he is very interested in "What is a population?" (Sto just populacji?), ie. what are loging boundaries. I tried to express view that we need to find out what levels of discontinuities are important to organisms for various functions + to what extent these relevant dis- continuities coincide. Also had extended discussion with Regina Rosalska & Nabegto regarding microtine cycles & the possible role of winter