CONTENTS XVII 



ScHAAKE (G.)- On the plane pencils containing three straight lines of a 



given algebraical congruence of rays. 522. 

 Schouten (J. A.). On a non-symmetrical affine field theory. 850. 

 ScH REINEM AKERS (F. A. H.). In-, mono- and divariant equilibria. XXIII. 



283. XXIV. 719. 

 Sex-characters (Secondary) and testis of the ten spined stickleback. (Gaster- 



osteus pungitius L.). 309. 

 Shoulder-blade (The development of the) in man. 297. 

 Shoulder-girdle (On the development of the) and episternum in reptiles. 15. 

 Sjollema (B.) and Miss J. E. van der Zande. Researches on the 



metabolism of milchcows suffering from acetonemia. 666. 

 Smedt (J. de) and W. H. Keesom. On the diffraction of Röntgen-rays in 



liquids. II. 112. 

 Smits (A.). The phenomenon of electrical supertension. III. 259. 



— The influence of intensive drying on internal conversion. I. 266. 



— The system sulphur trioxide. 1. 270. 



— The electromotive behaviour of magnesium. II. 395. 



Smits (E.), H. Zwaardemaker and W. E. Ringer. Is caesium radio-active? 



575. 

 South Celebes (On tertiary marine deposits with fossil fishes from). 159. 

 Spectra (A relation between the) of ionized potassium and argon. (Second 



comm.). 498. 

 Spectrum (The relation between the widening and the mutual influence of 



dispersion lines in the) of the sun's limb. 329. 

 Star-colours (On the magnitude equation of Osthoff's estimates of). 12. 

 Stelar-morphological questions (Etapteris Bertrandi Scott, a new etapteris 



from the upper carboniferous (lower coalmeasures) from England, and 



its bearing to). 669. 

 Stickleback (Secondary sex-characters and testis of the ten-spined). (Gas- 



terosteus pungitius L.). 309. 

 Stimulation (On) in auxotonic movements. 171. 

 Straelen (V. VAN). Description de crustacés décapodes noiiveaux des 



terrains tertiaires de Borneo. 489. 



— Description de Raniniens nouveaux des terrains tertiares de Borneo. 777. 

 String galvanometer (The) in wireless telegraphy. 635. 

 SuLFOBUTYRic ACID (n.z-) and its optically active components. 79. 

 Sulphoacetic acids (The second dissociation constant of) and x-sulphopro- 



pionic acids. 83. 

 Sulphur trioxide (The system). I. 270. 

 Sun's limb (The relation between the widening and the mutual influence 



of dispersion lines in the spectrum of the). 329. 



