XVII € ON TEN US 
RIJNBERK (G. VAN) presents a paper of Dr. A. A. Griinnaum: “On the nature 
and progress of visual fatigue”. 167. 
— presents a paper of Dr. S. pe Boer: “The structure and overlap of the 
dermatomes of the hindleg with the cat”, 321. 
— presents a paper of Dr. C. Orro Rorrors: “An exact method for the determi- 
nation of the position of the eyes at disturbances of motion’. 778. 
— presents a paper of Dr. S. pe Borr: “Contribution to the knowledge of the 
influence of digitalis on the frog’s heart”. 1029. 
SALOMONSON (1. K. A. WERTHEIM). Electric current measuring instruments 
with parabolic law of deflection. 896. 
SALTFILMs (Ultramicroscopic investigation of very thin metal and) obtained by evapo- 
ration in high vacuum. 958. 
SANDE BAKHUYZEN (BE. F. VAN DE). v. BAKHUYZEN (EK. F. vaN DE SANDE). 
SANDERS (c.). Contributions towards the determination of geographical positions 
on the West Coast of Africa. IV, 465. 
SATURN’S Satellites (On the theory of Hyperion, one of). 1225. 
SCHEFFER (r. B. C.). On the influence of temperature on chemical equilibria. 636. 
— On the allotropy of the ammonium halides. [Il 798. 
SCHEFFER (Fr. E. C.) and A. sMits. Interpretation of the Réntgenograms and 
Rontgenspectra of erystals. 432. 
SCHEFFER (J. D. R. and F. B. C.). On diffusion in solutions. L 148. 
SCHERRER’ calculation (Note on) of the entropy-constant. 546. 
SCHIERBEEK (A.). On the setal pattern of caterpillars. 24. IL. 1156. 
SCHREINEMAKERS (F. A. H.). In-, mono- and divariant equilibria. X. 514. 
XI. 718. XII. 816. XIII. 867. XIV. 927, XV. 999. XVI. 1196. XVIL. 1205. 
— presents a paper of Prof. A. Smits: “On the influence of the solvent on the 
situation of the homogeneous equilibrium”. I. 708. 
SEEDLINGS of Avena Sativa, (The influence of light- and gravitational stimuli on the), 
when free oxygen is wholly or partially removed. 1165. 
SEGREGATION (Variability of) in the hybrid. 805. 
SEMICIRCULAR CANALs (The determination of the position of the macula-planes and 
the planes of the) in the cranium. 49. 
SEMNOPITHECUs (The development of the Fossa Sylvii in embryos of). 938. 
SETAL PATTERN (On the) of caterpillars. 24. IL. 1156. 
SINUS VENOsUs (Researches ou the function of the) of the frog’s heart. 455. 
SITTER (W. DE). Planetary motion and the motion of the moon according to EINSTEIN's 
theory. 367. 
— On the relativity of rotation in E1nsTEIn’s theory. 527. 
— On the relativity of inertia. Remarks concerning Erystern’s latest hypo- 
thesis. 1217. 
— presents a paper of Mr. J. Wouter Jr. : “On the theory of Hyperion, one of 
Saturn’s satellites”. 1225. 
SKEW frequency curves. 670. 
