I Great and Small CirclesII Spherical TrianglesIII Spherical GeometryIV Relations between the Trigonometrical Functions of the Sidesand the Angles of a Spherical TriangleV Solution of Right-angled TrianglesVI Solution of Oblique-Angled TrianglesVII Circumscribed and Inscribed CirclesVIII Area of a Spherical Triangle. Spherical ExcessIX On certain approximate Formul X Geodetical OperationsXI On small variations in the parts of a Spherical TriangleXII On the connexion of Formul in Plane and Spherical Trigonometry.XIII PolyhedronsXIV Arcs drawn to fixed points on the Surface of a SphereXV Miscellaneous PropositionsXVI Numerical Solution of Spherical Triangles