As in Mainz, we had a number of visitors in Cologne. Hugh O’Neill spent several months in Cologne. As discussed above he had received the prestigious Humboldt Prize which enabled him to come to Cologne several times. I had extensive collaboration with Hugh, which is evident from the preceding sections.

Another visitor was Ping Kong from Beijing. She has been interested in meteorites for a long time and had spent some time with Mitsuru Ebihara in Japan, where she did extensive neutron activation analyses of meteorites and their components. In Cologne, she used the neutron activation analysis facility that was...

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