Mesures sur le site du Lab II

The network of survey reference points on the Laboratory II site being extended to meet the geodetic needs of the accelerator and of its North Experimental Area. The work had been greatly eased by the use of a geodolite, on loan from the Fermi Laboratory, which is a distance measuring instrument using a modulated laser beam. It was capable of accuracies of one part in a million over distances longer than could previously be measured in one stage at CERN.