A companion to the synopsis of the universe : or descriptive guide to the plates exhibiting the northern and southern sideral hemispheres, as forming concaves over the solar system ... for the 21st day of June 1798, ... together with a summary account of the comet which appeared in the summer 1797, ... By the author of The planispherical planetarium. - Watson, F. B. (published by W. Clarke, and J. Wallis,, 1798)