Our meeting revealed considerable quantitative improvements in the classical and non-classical methods of measuring the angular-momentum exchange within the earth-moon-system. The value of these measurements is enhanced by progress in the determination of meteorological influences on the earth’s rotation and of concomitant effects from celestial mechanics. The general improvement does not apply to the most desirable paleontological information, but in this field the performance of a variety of studies seems feasable, which — as was demonstrated — should give more insight into the growth mechanism. The theoretical interpretation of the tidal friction process has again confirmed the dominating role of the oceans in comparison with the solid earth. Computer models of the oceanic tides are able to give realistic estimates of the torques between the moon and the oceans whereas the treatment of the interaction between the oceans and the solid earth is problematic due to the implied small scales. The necessary maps of the old oceans can now be provided for a much longer time in the past than was thought before and with increasing accuracy in the more recent geological epochs.