The simultaneous observation of the electromagnetic and TeV muon components of extensive air showers by the EAS-TOP and MACRO detectors, respectively, is described for a period of 100 days in 1990. The two detectors and their combined resolutions are briefly reviewed and muon multiplicity distributions for various detector configurations are presented. A first analisys of the physical parameters N_μ and Nₑ related to the study of the primary composition at Eₒ = 10¹4 - 10¹6 eV is also presented.
Collaboration Infn (Fri,) studied this question.