CONTENTS. 



Accessory mineral (On the occurrence of diamond as an) in olivine and 

 anorthite bearing bombs, occurring in basaltic lava, ejected by the 

 volcano Gunung Ruang (Sangir — Archipelago north of Celebes). 510. 



Accommodation muscle (Determination of the power of the). 763. 



Acetonemia (Researches on the metabolism of milch-cows suffering from). 666. 



Addition of water (Researches on the) to ethylene and propylene. (Preli- 

 minary communication). 321. 



Adsorptive power (Researches on the nature of the so-called) of finely- 

 divided carbon. I. The binding of water by animal carbon. 548. 



Alcohol (The light oxidation of). III. The photocatalytic influence of some 

 series of ketones on the light oxidation of ethyl alcohol. 443. 



Amphibian larvae (On the determination of polarity in the epidermal 

 ciliated cell. After experiments on). 702. 



Anatomy. C. van Gelderen : "On the development of the shoulder-girdle 

 and episternum in reptiles". 15. 



— Kyozo Kudo: "Contributions to the knowledge of the brain of bony 

 fishes". 65. 



— C. U. Ariëns Kappers: "The ontogenetic development of the corpus 

 striatum in birds and a comparison with mammals and man". 135. 



— O. H. Dijkstra: "Tlie development of the shoulder-blade in man". 297. 



— J. W. VAN Wijhe: "Thymus, spiracular sense organ and fenestra vesti- 

 buli (ovalis) in a 63 m.m. long embryo of Heptanchus cinereus". 727. 



— J. I. Hunter: "The forebrain of Apteryx australis". 807. 

 Antagonism (Further researches on the) between citrate and calcium salt 



in biochemical processes, examined by the aid of substituted citrates. 

 (First comm.). 542. 



Anthropology. L. Bolk: "The menarche in Dutch women and its precipi- 

 tated appearance in the youngest generation". 650. 



Apogamy (Cytological investigations on) in some elementary species of 

 Erophila verna. 349. 



Apteryx Australis (The forebrain of). 807. 



Arc, infralateral (A non-tangent). 712. 



Argon (A relation between the spectra of ionized potassium and). (Second 

 comm.). 498. 



Ariëns Kappers (C. U.) v. Kappers (C. U. Ariëns). 



55 

 Proceeding Royal Acad. Amsterdam. Vol. XXVI. 



