CLASSIFICATION. 
Geometry 
Theory of Distance, 158 
Surfaces, 106, 107 
Transformation of Quadric Surfaces, 122, 127, 129, 136, 153 
Steiner’s extension of Malfatti’s Problem, 114 
In-and-circumscribed triangle and polygon, 115, 116, 128, 129 
Harmonic relation of two lines or points, 118 
Question proposed by Steiner, 132 
Caustics, 124, 145 
Cubic Curves, 146, 157 
Analysis 
Skew Determinants, 137 
Attractions and Multiple Integrals, 108 
Definite Integrals, 103 
Elliptic and Abelian Integrals, 110, 113, 117, 123, 130 
Covariants, Quantics &c., 131, 134, 135, 139, 141, 142, 143, 144, 155, 156, 158 
Matrices, 138, 152 
Partition of Numbers, 140, 154 
Symmetric Functions &c., 147, 148, 149, 150 
Lagrange’s Theorem, 101 
Double Infinite Series, 102 
Permutants, 104, 105 
Rationalisation of Algebraic Expression, 109 
Transformation of Trigonometrical Expression, 110 
Theorem of Lejeune-Dirichlet’s, 111 
Products of Sums of Squares, 112 
Factorials, 119 
Generalisation of Binomial Theorem, 120 
Question in Probabilities, 121 
Groups, 125, 126 
Theorem of Schhifli’s, on Elimination, 133 
Sturmian Functions, 151