The first attempts to use the EISCAT VHF radar to make incoherent scatter measurements of the mesosphere took place in February 1987 and some of the results are presented. Measurements of the electron concentration were made together with tentative calculations of the ratio of negative ions to free electrons. The vertical motion of the neutral atmosphere was also deduced and both chaotic and well-defined wave structures were observed. One particularly well-defined wave is examined and possible mechanisms are discussed, including generation by the solar terminator. ¿ American Geophysical Union 1987