52 Contents of Volume X. 
676. Note on a theorem in determinants ...... 
Quart. Math. Journ., t. xv. (1878), pp. 55—57 
677. [ Addition to Mr Glaishers paper. “ Proof of Stirling s theorem”] 
Quart. Math. Journ., t. xv. (1878), pp. 63, 64 
678. On a system of quadric surfaces ...... 
Quart. Math. Journ., t. xv. (1878), pp. 124, 125 
679. On the regular solids ........ 
Quart. Math. Journ., t. xv. (1878), pp. 127—131 
680. On the Hessian of a quartic surface ..... 
Quart. Math. Journ., t. xv. (1878), pp. 141—144 
681. On the derivatives of three binary quantics . . . . 
Quart. Math. Journ., t. xv. (1878), pp. 157—168 
682. Formulae relating to the right line ...... 
Quart. Math. Journ., t. xv. (1878), pp. 169—171 
683. On the function arc sin (x + iy) . ...... 
Quart. Math. Journ., t. xv. (1878), pp. 171—174 
684. On a relation between certain products of differences 
Quart. Math. Journ., t. xv. (1878), pp. 174, 175 
685. On Mr Cotterill's goniometrical problem ..... 
Quart. Math. Journ., t. xv. (1878), pp. 196—198 
686. On a functional equation ........ 
Quart. Math. Journ., t. xv. (1878), pp. 315—325; Proc. Lond. Math. 
Soc., t. ix. (1878), p. 29 
687. Note on the function ^ (x) = a~ (c — x) + {c (c — x) — 6 2 } 
Quart. Math. Journ., t. xv. (1878), pp. 338—340 
688. Geometrical considerations on a solar eclipse .... 
Quart. Math. Journ., t. xv. (1878), pp. 340—347 
689. On the geometrical representation of imaginary variables by 
a real correspondence of tivo planes ..... 
Proc. Lond. Math. Soc., t. ix. (1878), pp. 31—39 
690. On the theory of groups ........ 
Proc. Lond. Math. Soc., t. ix. (1878), pp. 126—133 
691. Note on Mr Monro's paper “ On flexure of spaces'’ 
Proc. Lond. Math. Soc., t. ix. (1878), pp. 171, 172 
692. Addition to [578] memoir on the transformation of elliptic 
functions .......... 
Phil. Trans., vol. 169, Part II. (for 1878), pp. 419—424 
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