VI CONTENTS 
CrustaL MOVEMENTS (On the) in the region of the curving rows of Islandsin the 
Eastern part of the East-Indian Archipelago. 772. 
CRYSTALLINE LAMELLAE. (On the Symmetry of the RONTGENpatterns Obtained 
by means of Systems Composed of) and on the Structure of Pseudo- 
Symmetrical Crystals. 815. 
Cusics (Complexes of Plane) with Four Base Points. 909. 
CYCLOPIA (On) with conservation of the Rhinen-cephalon. 283. 
Dam (Miss E. vAN) and R. BRINKMAN. A method for the determi- 
nation of the ion concentration in ultra filtrates and other protein free 
solutions. 762. 
DARKNESS-NYSTAGMUS (On the question whether or no) in dogs originates in 
the Labyrinth. 393. 
DENITRIFICATION (Chemosynthesis at) with sulfur as source of energy. 899. 
DENJOyY (ARNAUD). Sur les ensembles clairsemés. 882. 
DESARGUES (On a Quartic Curve of Genus Two in which an Infinity of 
Configurations of) can be Inscribed. 645. 
DEVELOPMENT (About the influence of radio-active elements on the). 563. 
DIiAMONDCRYSTAL (On the rings of connecting-electrons in BRAGG’s model 
of the). 536. 
DicHLOR-BENZENE (On the Nitration-Products of p-). 661. 
DIMETHYLANILINE (On some nitro-derivatives of). 523. 
DISTRIBUTION OF ENERGY (A Theory of a Method for the Derivation of 
the) in a Narrow Spectrum Region from the Distribution of Energy, 
Observed in an Interferometer. 200. 
Doe (On Optic “Stellreflexe” in the) and in the Cat. 948. 
Does (On the question whether or no Darkness-nystagmus in) originates 
in the Labyrinth. 393. 
Dusois (EuG). The Quantitative Relations of the Nervous System 
Determined by the Mechanism of the Neurone. 665. 
Dussxky (J. V.) and H. J. BACKER. On the preparation of «-sulphopro- 
pionic acid. 415. 
EAsT-INDIAN ARCHIPELAGO (On the Crustal Movements in the region of the 
curving rows of Islands in the Eastern part of the). 772. 
EERLAND (L.) and W. STORM vAN LEEUWEN. On Adsorption of Poisons 
by Constituents of the Animal Body. I. The adsorbent power of serum 
and brainsubstance for Cocain. 831. 
EINHEITSWURZELN (Bestimmung der Klassenzahl der Ideale aller Unterkérper 
des Kreiskörpers der m-te2) wo die Zahl m durch mehr als eine Prim- 
zahl teilbar ist. Ister Teil 331. 2ter Teil. 395. 
— (Ueber die Zerlegungsgesetze für die Primideale eines beliebigen alge- 
braischen Zahlkörpers im Körper der 1/-ten). 873. 
ELECTRIC CHARGE (Note on the circumstance that an) moving in accordance 
with quantum-conditions does not radiate. 145. 
