Abstract
In this paper we publish our final data from our extended program of the observation on our 13-color medium-narrow-band photometric system. We have observed essentially all of the stars brighter than the fifth visual magnitude north of declination -20, and essentially all of the stars brighter than the fourth visual magnitude south of declination -20. The observations have been carefully tied together and we believe that the system is homogeneous to an unusual degree over the entire sky. The effective wavelengths of the filter-bands have been discussed in detail and a new absolute calibration, based upon all of the avalaible data is derived. This photometric system should be useful, therefore, for the standardization of other photometric systems, as well as the narrow-band spectrophotometry.
