CLASSIFICATION. 
Geometry 
Reciprocal Surfaces, 227 
Analytical Representation of Curves in Space, 284, 294 
Contour and Slope Lines, 246 
Polyhedra, 241, 242, 259 
Conics, 238, 261, 276, 279, 280, 285, 292, 296 
Cubic Curves, Cones, »fee., 249, 257, 258, 295 
Curvature of Curves and Surfaces, 288 
Double Tangents, 260, 270 
Envelopes, Parallel Curves and Surfaces, 250, 253, 254 
Homographic Figures, 283 
In-and-circumscribed Polygon, 267, 282 
Mac Cullagh’s Polar Plane, 226 
Spherical Triangles, 240 
Wave Surface, 277, 281 
Analysis 
Mathematics, Recent Terminology in, 299 
Dynamics. Report on the Progress of the solution of certain Special Problems, 298 
Class of Problems in, 225, Moments of Inei*tia, 291 
Quantics, binary and ternary, &c., 232, 233, 269, 271 
Equation of Differences, Quintic Equation, &c., 252, 262, 266, 268, 287 
Tschirnhausen’s Transformation, 273, 274, 275 
Theory of Numbers, 231, 236, 239 
Determinants, 237, 286, 297 
Derivations (Arbogast), 264, 265 
Differentiation, 251, Differential Equations, 272, 278 
Finite Differences ; (Electricity), 244, 245 ; 263 
Elimination, 223, 230 
Elliptic Integrals, Modular Functions, 235, 293 
Integral Calculus, Definite Integrals, 224, 228 
Equations, 248, 256 
Groups, 243 
Numerical Expansions, 289 
Partitions, 255 
Reversion of Series, 229, 234 
Sturmian Constants, 290 
Trees, 247