We analyze the properties of a sample of galaxies identified in a 21cm, H I-line survey of selected areas in the Perseus-Pisces supercluster and its foreground void. Twelve fields were observed in the supercluster, five of them (target fields) centered on optically bright galaxies, and the other seven (blank fields) selected to contain no bright

Star counts from the Two-Micron Galactic Survey are used to determine the nature of peaks for 350> 1> 150 in the Galactic plane in the 2- m surface-brightness maps. Low extinction by itself is demonstrated to be insufficient to explain the peaks. The peak at 1=330 is shown to have a different luminosity function from those at 1=210 and 270, the

We have used all available radio-source surveys to construct the continuum spectra for sources in an area of 5 by 10 degrees near the North Ecliptic Pole (NEP), previously observed at 2.7 GHz with the Effelsberg telescope. Most of the surveys are of similar angular resolution (~3 to 5 arcmin) and cover a wide range of frequencies from 38 MHz to 5

Results of cooperative optical observations of EV Lac in September 1991 are presented. During 50 hours of photoelectric monitoring more than 40 flares were detected, including several events of moderate power and one very strong flare with amplitude {DELTA}U=3.7mag and duration of about half hour. Detailed colour analysis of this strong flare

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