CONTENTS. 
action OF LIGHT (A difference between the) and of X-rays in the photographic- 
plate. 671. 
apprtivity (On the) of the values 4 and p/a of the equation of state, and on the funda- 
mental values of these quantities for different elements, in connection with the 
periodical system. 1220. 
AFTER-SOUNDS (On). 811. 
AIRBLADDER of fishes (Physiology of the). 572. 
AJAWI (On phosphorite of the isle of). 214, 
ALCOHOL (The photo-oxidation of) with the co-operation of ketones. 1640. 
ALCOHOLIC SOLUTIONS, (Temperature-coefficient of conductivity in) and extension of 
Kounravscu’s hypothesis to alsoholic solutions. 373. 
ALGEBRAIC SURFACES (Characteristic numbers for nets of). 1270. 
ALKYLBENZIDINES (Nitroderivatives of). 757. 
ALLOTROPIC SUBSTANCES (Ihe apparent contradiction between theory and practice in 
the crystallisation of) from different solvents. 363. 
ALLOTROPY (Molecular) and Phase-Allotropy in organic chemistry. 346. 
— (The) of Sodium. [. 91. 
— (On the) of ammonium halides, I, 446, IL. 1498. 
— (The P, X-figures of unary systems, according to the theory of). 1334. 
— (The application of the theory of) to electromotive equilibria. IV. 1485. 
ALTERNATING CURRENTS (On the influence of) of decreasing intensity on the magne- 
tisation of iron, 1299. 
AMMONIUM HALIDES (On the allotropy of the) L. 446. If. 1498. 
AMPERE’s molecular currents (Experimental proof of the existence of). 696. 
Anatomy. J. Boerke: “On the structure and the innervation of the musculus sphincte 
pupillae and the musculus ciliaris of the bird’s eye.” 2. 
— W. A. MissBrra: “On the structure of the muscular abdominal wall o 
primates”. 19. 
“_ J. A. J. Bares: “On the metamerological signification of the craniovertebra 
interval”. 191. 
— J. A. J. Barae: “The genetical signification of some atlas-variations”. 201. 
— H. A. VERMEULEN: “The vagus-area in Camelopardalus Giraffe.” 647. 
— L. Bork: “On the relation between the dentition of Marsupials and that o 
Reptiles and Monodelphians.” 715. 
— Hl. A. VERMEULEN: ‘On the conus medullaris of the domestic animals?” 780. 
L09 
Proceedings Royal Acad. Amsterdam. Vol. XVIII. 
