CONTENTS. 
vi ii 
PAGE 
897. 
Sur les racines d'une équation algébrique .... 
Comptes Rendus, t. ex (1890), pp. 174.—176, 215—218 
33 
911. On 
a 
898. 
Sur l'équation modulaire pour la transformation de l'ordre 
Comptes Rendus, t. exi (1890), pp. 447—449 
11 
38 
912. On 
899. 
Sur les surfaces minima ....... 
Comptes Rendus, t. exi (1890), pp. 953, 954 
• 
41 
913. On 
900. 
James Joseph Sylvester ........ 
(Scientific Worthies in Nature, xxv) ; Nature, vol. xxxix (1889), 
pp. 217—219 
43 
h 
914. On 
901. 
Note on the sums of two series ...... 
Messenger of Mathematics, t. xix (1890), pp. 29—31 
49 
915. On 
902. 
On the focals of a quadric surface ..... 
Messenger of Mathematics, t. xix (1890), pp. 113—117 
• 
51 
916. \_Noti 
903. 
On Latin squares ........ 
Messenger of Mathematics, t. xix (1890), pp. 135—137 
• 
55 
917. [Not 
904. 
Note on reciprocal lines ....... 
Messenger of Mathematics, t. xix (1890), pp. 174, 175 
• 
58 
918. On 
se\ 
905. 
906. 
On the equation x 1 ' — 1 = 0 . 
Messenger of Mathematics, t. xix (1890), pp. 184—188 
Note on Schlaefi’s modular equation for the cubic transform- * 
60 
919. On t, 
ation; with a correction ...... 
Messenger of Mathematics, t. xx (1891), pp. 59, 60; 120 
64 
920. On o 
907. 
Note on the ninth roots of unity ..... 
Messenger of Mathematics, t. xx (1891), p. 63 
66 
921. On sì 
908. 
On tivo invariants of a quadri-quadric function 
Messenger of Mathematics, t. xx (1891), pp. 68, 69 
67 
922. Note 
909. 
On a particular case of Rummer's differential equation 
of 
the third order ........ 
Messenger of Mathematics, t. xx (1891), pp. 75—79 
• 
69 
923. Note 
910. 
Note on the involutant of tivo matrices .... 
Messenger of Mathematics, t. xx (1891), pp. 136, 137 
• 
74 
924. On th 
C. XIII.