x GCONTENTS 
Jurrius (W. H.) presents a paper of Mr. H. Groot: “On the Effective 
Temperature of the Sun.” 89. II. 615. 
— presents a paper of Mr. K. F. Niessen: “A Theory of a Method for 
the Derivation of the Distribution of Energy in a Narrow Spectrum Region 
from the Distribution of Energy, Observed in an Interferometer.” 200. 
JUPITER'S Satellites (Theory of). II. The variations. 236. 
KAMERLINGH ONNES (H.). v. ONNES (H. KAMERLINGH). 
KAMPEN (P. N. van). On the phylogeny of the hair of mammals. 140. 
KaPTEYN (W.) presents a paper of Dr. N. G. W. H. BEEGER: “Bestimmung 
der Klassenzahl der Ideale aller Unterkörper des Kreiskörpers der 
m-ten Einheitswurzeln, wo die Zahl m durch mehr als eine Primzahl 
teilbar ist.” 1ster Teil 331. 2ter Teil. 395. 
— On a formula of SYLVESTER. 555. 
— presents a paper of Dr. N. G. W. H. Brrcer: “Ueber die Zerle- 
Sungsgesetze für die Primideale eines beliebigen algebraischen Zahl- 
körpers im Körper der //-ten Einheitswurzeln.” 873. 
KEREKIJARTO (B. VON). Ueber Transformationen ebener Bereiche. 475. 
— Ueber die endlichen topologischen Gruppen der Kugelfläche. 568. 
KLASSENZAHL (Bestimmung der) der Ideale aller Unterkörper des Kreis- 
körpers der m-ten Einheitswurzeln, wo die Zahl # durch mehr als eine 
Primzahl teilbar ist. 1ster Teil 331. 2ter Teil 395. 
KLeEyYN (A. pe) and R. Manus. Tonic reflexes of the labyrinth on the 
eye-muscles. 242, 
— and R. Maanus. On Optic “Stellreflexe” in the Dog and in the Cat. 948. 
— and W. STORM VAN LEEUWEN. Concerning Vestibular Eye-reflexes. 
Il. The Genesis of cold-water nystagmus in rabbits. 713. 
— and C. R. J. VERSTEEGH. On the question whether or no Darkness- 
nystagmus in dogs originates in the Labyrinth. 393. 
KrLuyver (J. C.). On LAMBERT'S series. 323. 
— presents a paper of Prof. W. vAN DER Woupe: “On a Quartic Curve 
of Genus Two in which an Infinity of Configurations of DESARGUES 
can be Inscribed.” 645. 
KorTEweG (D. J.) presents a paper of Prof. FRED. SCHUH: “The Remainder 
in the Binomial-series.” 291. 
— presents a paper of Prof. Frep. ScHuH: “A problem of combinatorial 
analysis connected with the determination of the number of different 
ways in which the greatest common divisor of two products can be 
found.” 293. 
— presents a paper of Prof. Frep. SCHUH: “Theorem on the term by 
term differentiability of a series.” 376. 
