The computation of an orbit from three complete observations. : From the "Theoria motus corporum clestium" of Charles Frederick Gauss. With an appendix containing Prof. Encke's conclusions in his discussion of the values of Z, his table for determining the existence of the double orbit, and Professor Peirce's graphic delineations of the curves, showing geometrically the roots of the Gaussian equation <IV.>, and the point of osculation in the doubtful case /