Contents of Volume XII. 
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875. 
876. 
877. 
878. 
879. 
880. 
881. 
882. 
883. 
884. 
885. 
886. 
887. 
On the system of three circles which cut each other at given 
angles and have their centres in a line .... 
Messenger of Mathematics, t. xvn. (1888), pp. 60—69 
On systems of rays ......... 
Messenger of Mathematics, t. xvn. (1888), pp. 73—78 
Note on the tivo relations connecting the distances of four 
'points on a circle ........ 
Messenger of Mathematics, t. xvn. (1888), pp. 94, 95 
Note on the anharmonic ratio equation ..... 
Messenger of Mathematics, t. xvii. (1888), pp. 95, 96 
Note on the differential equation -r r f X ^—r = 0 . 
n/( 1 — ar) J{l-y 2 ) 
Messenger of Mathematics, t. xvm. (1889), p. 90 
Note on the relation between the distance of five points in space 
Messenger of Mathematics, t. xvm. (1889), pp. 100—102 
On Hermites H-product theorem . ..... 
Messenger of Mathematics, t. xvm. (1889), pp. 104—107 
A correspondence of confocal Cartesians ivith the right lines 
of a hyperboloid ......... 
Messenger of Mathematics, t. xvm. (1889), pp. 128—130 
Analytical formula in regard to an octad of points 
Messenger of Mathematics, t. xvm. (1889), pp. 149—152 
Note sur les surfaces minima et le théorème de Joachimsthal . 
Comptes Rendus, t. cvi. (1888), pp. 995, 996 
On the Diophantine relation, y 1 + y n = Square . 
Proc. Lond. Math. Soc., t. xx. (1889), pp. 122—127 
On the surfaces with plane or spherical curves of curvature . 
American Journal of Mathematics, t. xi. (1889), pp. 71—98; pp. 
293—306 
On the theory of groups ........ 
American Journal of Mathematics, t. xi. (1889), pp. 139—157 
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C. XIV. 
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