Shobbrook, Robert Reginald2017-12-112017-12-111963b1649477http://hdl.handle.net/1885/137463The present work represents an extension of the existing photographic, spectrographic and particularly photometric observations of the external galaxies visible primarily from the Southern Hemisphere. Photoelectric colours and magnitudes have been obtained for 53 galaxies through from one to four diaphragms of different sizes. The photometric system to which these are reduced is the UBV system of Johnson and Morgan. To supplement the data, large scale photographs, and also spectra, of many of the objects have been obtained.135 leavesenGalaxies196310.25911/5d6cf7ede4d142017-11-22