X 
CONTENTS. 
PAGE 
667. 
On the bicircular quartic—Addition to Professor Caseys 
memoir: “ On a new form of tangential equation ’ 
223 
681. 
Phil. Trans., t. 167 (for 1877), pp. 441—460 
682. 
668. 
On compound combinations ....... 
243 
Proceedings of the Lit. Phil. Soc. Manchester, t. xvi. (1877), pp. 
113, 114; Memoirs, ib., Ser. hi., t. vi. (1879), pp. 99, 100 
683. 
669. 
On a problem of arrangements ...... 
245 
684. 
Edin. Roy. Soc. Proc., t. ix. (1878), pp. 338—342 
670. 
\_Note on Mr. Muir’s solution of a 11 problem of arrangement ”] 
249 
685. 
Edin. Roy. Soc. Proc., t. ix. (1878), pp. 388—391 
671. 
On a sibi-reciprocal surface ....... 
252 
686. 
Berlin, Akad. Monatsber., (1878), pp. 309—313 
672. 
On the game of mousetrap ....... 
256 
673. 
Quart. Math. Journ., t. xv. (1878), pp. 8—10 
Note on the theory of correspondence ..... 
259 
687. 
674. 
Quart. Math. Journ., t. xv. (1878), pp. 32, 33 
Note on the construction of Cartesians ..... 
261 
688. 
Quart. Math. Journ., t. xv. (1878), p. 34 
689. 
675. 
On the fleflecnodal planes of a surface ..... 
262 
Quart. Math. Journ., t. xv. (1878), pp. 49—51 
676. 
Note on a theorem in determinants ..... 
265 
690. 
Quart. Math. Journ., t. xv. (1878), pp. 55—57 
677. 
[Addition to Mr. Glcdsher’s paper “Proof of Stirlings theorem ”] 
267 
691. 
Quart. Math. Journ., t. xv. (1878), pp. 63, 64 
678. 
On a system of quadric surfaces ...... 
269 
Quart. Math. Journ., t. xv. (1878), pp. 124, 125 
692. 
679. 
On the regular solids ........ 
270 
Quart. Math. Journ., t. xv. (1878), pp. 127—131 
680. 
On the Hessian of a quartic surface ..... 
274 
693. 
Quart. Math. Journ., t. xv. (1878), pp. 141—144