Xll 
CONTENTS. 
PAGE 
694. Desiderata and Suggestions . . . . . . . 401 
No. 1. The theory of groups ; 
American Journal of Mathematics, t. i. (1878), pp. 50—52 
No. 2. The theory of groups; graphical representation ; 
American Journal of Mathematics, t. i. (1878), pp. 174—176 
No. 3. The Newton-Fourier imaginary problem; 
American Journal of Mathematics, t. n. (1879), p. 97 
No. 4. The mechanical construction of conformable figures; 
American Journal of Mathematics, t. ii. (1879), p. 186 
695. 
A link-ivork for x 2 : extract from a letter to Mr. Sylvester 
American Journal of Mathematics, t. I. (1878), p. 386 
407 
696. 
Calculation of the minimum N.G.F. of the binary seventhic . 
American Journal of Mathematics, t. n. (1879), pp. 71—84 
408 
697. 
On the double ^-functions........ 
Crelle’s Journal der Mathem., t. lxxxvii. (1879), pp. 74—81 
422 
698. 
On a theorem relating to covariants ..... 
Crelle’s Journal der Mathem., t. lxxxvii. (1879), pp. 82, 83 
430 
699. 
On the triple S'-functions ........ 
Crelle’s Journal der Mathem., t. lxxxvii. (1879), pp. 134—138 
432 
700. 
On the tetrahedroid as a particular case of the 16-nodal quartic 
surface ........... 
Crelle’s Journal der Mathem., t. lxxxvii. (1879), pp. 161—164 
437 
701. 
Algorithm for the characteristics of the triple ^-functions 
Crelle’s Journal der Mathem., t. lxxxvii. (1879), pp. 165—169 
441 
702. 
On the triple ^-functions ........ 
Crelle’s Journal der Mathem., t. lxxxvii. (1879), pp. 190—198 
446 
703. 
On the addition of the double ^-functions .... 
Crelle’s Journal der Mathem., t. lxxxviii. (1880), pp. 74—81 
455 
704. 
A memoir on the single and double theta-functions . 
Phil. Trans., vol. 171, Part hi. (for 1880), pp. 897—1002 
463 
705. 
Problems and Solutions ........ 
Mathematical Questions with their Solutions from the Educational 
Times, vols. xiv. to lxi. (1871—1894); for contents, see p. 615 
566