Observations of scintillated 54 Mc signals from the satellite Transit IVA have been made for the past two years at seven laboratories in Europe and one in the U.S. Analysis of these data shows effects at mid-latitudes which are parallel to those found previously in geomagnetically similar areas. Lower latitude observatories show low indices of scintillation and little variation of scintillation index with latitude. High latitude observations show the distinct effects present in auroral regions, high indices being recorded most of the time with the highest being overhead and decreasing to the south. At these latitudes effects of zenith angle are less than those due to latitude variation. At middle and lower latitudes there is a symmetrical zenith angle dependence. Frequency distributions of the indices versus latitude at one location show that at lower latitudes the fall off roughly exponentially from a peak near zero while at higher latitudes the shape of the distribution favors the high indices. (Author).