CONTENTS. 
XI 
PAGE 
PAGE 
223 
681. 
On the derivatives of three binary quantics .... 
Quart. Math. Journ., t. xv. (1878), pp. 157—168 
278 
243 
682. 
Formula relating to the right line ...... 
Quart. Math. Journ., t. xv. (1878), pp. 169—171 
287 
683. 
On the function arc sin (x + iy). 
Quart. Math. Journ., t. xv. (1878), pp. 171—174 
290 
245 
9AQ 
684. 
On a relation between certain products of differences 
Quart. Math. Journ., t. xv. (1878), pp. 174, 175 
293 
¿a.r ¿7 
252 
685. 
On Mr. CotterilVs goniometrical problem ..... 
Quart. Math. Journ., t. xv. (1878), pp. 196—198 
295 
256 
686. 
On a functional equation .... ... 
Quart. Math. Journ., t. xv. (1878), pp. 315—325 ; Proc. Lond. Math. 
Soc., t. ix. (1878), p. 29 
298 
259 
687. 
Note on the function ^ (x) = a 2 (c-x)-r {c (c — x) — b 2 } 
Quart. Math. Journ., t. xv. (1878), pp. 338—340 
307 
261 
688. 
Geometrical considerations on a solar eclipse .... 
Quart. Math. Journ., t. xv. (1878), pp. 340—347 
310 
262 
689. 
On the geometrical representation of imaginary variables by 
a real correspondence of two planes ..... 
Proc. Lond. Math. Soc., t. ix. (1878), pp. 31—39 
316 
265 
690. 
On the theory of groups ........ 
Proc. Lond. Math. Soc., t. ix. (1878), pp. 126—133 
324 
267 
269 
691. 
692. 
Note on Mr. Monro's paper “ On fiexure of spaces ” 
Proc. Lond. Math. Soc., t. ix. (1878), pp. 171, 172 
Addition to [578] memoir on the transformation of elliptic 
331 
270 
functions .......... 
Phil. Trans., vol. 169, Part ii. (for 1878), pp. 419—424 
333 
274 
693. 
A tenth memoir on quantics ....... 
Phil. Trans., vol. 169, Part ii. (for 1878), pp. 603—661 
339