A specimen of a general astronomical catalogue, arranged in zones of north polar distance, and adapted to Jan. 1, 1790 : containing a comparative view of the mean positions of stars, nebulae and clusters of stars, as they come out upon calculation from the tables of several principal observers; together with a proposal for setting on foot some regular method of observing the heavens, through the concurrent assistance of astronomers in all nations; in order to from a more perfect register of their present state, and discover any alterations to which they may regularly be subject, or which they may at any time hereafter undergo