CONTENTS III 



Bird's head („Vogelkop") (Geological data derived from the region of the) 



of New-Guinea. 274. 

 Boer (J. H. de) and H. J. Backer, n. z-Sulfobutyric acid atid its optically 



active components. 79. 

 Boeseken (J.). The valency of boron. 97. 

 BoLK (L.). The menarche in Dutch women and its precipitated appearance 



in the youngest generation. 650. 

 Bombs (On the occurrence of diamond as an accessory mineral in olivine 



and anorthite bearing), occurring in basaltic lava, ejected by the volcano 



Gunung Ruang (Sangir-Archipelago north of Celebes). 510. 

 Bony fishes (Contributions to the knowledge of the brain of). 65. 

 Boric acid compounds (Provisional communication on) of some organic 



substances containing more than one hydroxyl-group. Boron as a 



pentavalent element. 32. 

 Borneo (Description de crustacés décapodes nouveaux des terrains tertiaires 



de). 489. 



— Description de Raniniens nouveaux des terrains tertiaires de). 777. 

 Boron as a pentavalent element. 32. 



— (The valency of). 97. 



BoscHMA (H.). Experimental budding in Fungia fungites. 88. 

 Botany. J. M. Janse : "On stimulation in auxotonic movements". 171. 



— J. P. Bannier : "Cytological investigations on apogamy in some 

 elementary species of Erophila verna". 349. 



— F. W. T. Hunger: "On the nature and origin of the cocos-pearl." 357. 



— Th. Valeton : "The genus Coptosapelta Korth. (Rubiaceae)". 361. 



— D. Tollenaar : "Dark growth-responses". 378. 



— D. S. Fernandes: "A method of simultaneously studying the absorp- 

 tion of Oi and the discharge of COi in respiration". 408. 



— Th. Weevers: "Ringing experiments with variegated branches". 755. 

 Brain (Contributions to the knowledge of the) of bony fishes. 65. 

 Branches (Ringing experiments with variegated). 756. 



Breit (G.). Transients of magnetic field in supra-conductors. 529. 



— and H. Kamerlingh Onnes. Magnetic researches. XXVI. Measurements 

 of magnetic permeabilities of chromium chloride and gadolinium sulph- 

 ate at the boiling point of liquid hydrogen in alternating fields of 

 frequency 369,000 per second. 840. 



Brinkman (R.) and A. v. Szent-Györgyi. Researches on the chemical 

 causes of normal and pathological haemolysis. 470. 



Brouwer (H. A.). Fractures and faults near the surface of moving geantic- 

 lines. III. The liorizontal movement of the Central-Atlantic ridge. 167. 



— and L. F. de Beaufort. On tertiary marine deposits with fossil fishes 

 from South Celebes. 159. 



