XXII G SOFN PE NSLS. 
SALOMONSON (J. K. A. WERTHEIM). The electrocardiogram of the foetal 
heart. 1360. 
SALTS (Influence of some inorganic) on the action of the lipase of the pancreas. 336. 
SANDE BAKHUIJZEN (E F. VAN DE). v. BAKHUIJZEN (E. F. VAN DE SANDF). 
SANDE BAKHUIJZEN (H. G. VAN DE). v. BAKHUIJZEN (H. G. van DE SANDE) 
SCHEFFER (F. E. C.). On the system ether-water. 380. 
— On quadruple-points and the continuities of the three-phase lines. 389. 
— On velocities of reaction aud equilibria’. 1109. 
— On the velocity of substitutions in the benzene nucleus. 1118. 
— and J. P. Treus. Determinations of the vapour tension of nitrogen tetroxide. 166. 
SCHELTEMA (N.). Determination of the geographical latitude and longitude of 
Mecca and Jidda executed in 1910-11. Part [. 527. Part IL. 540. Part IIL. 556. 
scHLAFIT (On a differential equation of). 27. 
SCHOUTE (J. C.). Dichotomy and lateral branching in the Pteropsida. 710. 
SCHOUTE (P. H.) presents a paper of Dr. E, L. Eire: ‘The scale of regularity of 
polytopes”. 200. 
— presents a paper of Dr. W. van pER Woupe: “On Steinerian points in con- 
nection with systems of nine g-fold points of plane curves of order 3 0”. 938. 
SCHREINEMAKERS (F. A. H.) presents a paper of Prof. W. Reinpers and S. br 
Lance: “The system Tin-Iodine”. 474. 
— presents a paper of Prof. W. Reinpers and D. Lery Jr: “The distribution of 
dvestufis between two solvents. Contribution to the theory of dyeing”. 482. 
— Equilibria in ternary systems. I. 700. IL. 853. III. 867. IV. 1200. V. 1213. 
VI A28 VIEISIS: 
— and Miss W.C. pe Baar. On the quaternary system: KC1-CuClo-BaClo-Ha0. 467. 
— and J. Minixan. On a few oxyhaloids. 52. 
— and D. J. van Proorye. The system scdium sulphate, mangane sulphate and 
water at 35°. 1326. 
— and J. C, Troxus. The system HeCl,-CuClg-H30, 472. 
SEA-LEVEL at Helder (‘The periodic change in the) in connection with the periodic 
change in the latitude. 1441. 
SEASONS (Influence of the) on respiratory exchange during rest and during muscular 
exercise. 790. 
SHORTENING-REFLEX (On a). 1092. 
SIERTSEMA (L. H.). Determinations of refractive indices of gases under high pres- 
sures. 2nd Communication. 925. 
S1RKsS (J. F.). Measurements on the ultraviolet magnetic rotation of gases, 773. 
SITTER (W. DE). On absorption of gravitation and the moon’s longitude. Part Kk 
808. Part 2. 824. 
— A proof of the constancy of the velccity of light, 1297. 
SMITS (A.). On critical end-points in ternary systems. II. 184. 
— Extansion of the theory of allotropy. Monotropy and enantiotropy for liquids. 861 
— The application of the theory of allotropy to the system sulphur. IL. 369. 
— The inverse occurrence of solid phases in the system iron-carbon. 371. 
