XX GOIN TOEN: EB, 
Physiolegy. C. J. C. vaN llooGrxuvmze and J. NIEUWENHUIJSE: “Influence of the 
seasons on respiratory exchange during rest and during muscular exercise”. 790. 
— W. E. Rixcer and H. van Trier: “Influence of the reaction upon the action 
of ptyalin”. 799. 
— C. Winter: “On localised atrophy in the lateral geniculate body causing 
quadrantic hemianopsia of both the right lower fields of vision”. 840. 
— J. K. A. WertHerm SALOMONSON : “On a shortening-reflex’”’ 1092. 
— H. J. HAMBURGER and J. pe Haan: “The effect of fatty acids and soaps on 
phagocytosis”. 1290. 
— J. K. A. WERTHEIM Satomonson: “The electro-cardiogram of the foetal heart”. 
1360. 
PLANTS (On the demonstration of carotinoids in). Ist Communication. 511. 2nd Com- 
munication, 686. 3rd Communication. 693. 
points (An involution of associated). 1263. 
POLAR ARMATURES (A theory of). 330. 
POLARISATION (On the) impressed upon light by transversing the slit of a spectro- 
scope and some errors resulting therefrom. 599. 
POLE-STAR (The variability of the). 1192. 
POLYOXY COMPOUNDS (On a method for a more exact determination of the position 
of the hydroxyl groups in the). 216. 
POLYTOPES (The scale of regularity of). 200. 
potassium compounds (The radioactivity of rubidium and). II. 22. 
POTASSIUM SULFER and magnesium in the metabolism of Aspergillus niger. 1349. 
POTENTIAL (The calculation of the thermodynamic) of mixtures when a combination 
can take place between the components. 614. 
POTENTIAL of molecular attraction (The laws of surface-adsorption and the). 445. 
PRECIPITATES (On intravital). 1329. 
PRESSURE (On the change induced by) in electrical resistance at lcw temperatures. 
I. 947. 
PRIMATES (On the external nose of). 129. 
— (On the JacoBsoN’s organ of). 134. 
PROOIJE (D. J. vAN) and F. A. H. ScHREINEMAKERS. The system sodium-sulphate, 
mangane-sulphate and water at 35°. 1526. 
PTEROPSIDA (Dichotomy and lateral branching in the). 710.. “ 
PTYALIN (Influence of the reaction upon the action of). 799. 
PYRITE (Measurements on resistance of a) at low temperatures down to the melting 
point of hydrogen. 1384. 
QUADRUPLE-POINTS (On) and the continuities of the three-phase lines. 389. 
QUANTITY 4 (Some remarks on the course of the variability of the) of the equation 
of state. 1131. 
QvarTz (The piezo-electric and pyro-electric properties of) at low temperatures down 
to that of liquid hydregen. 1380. 
QUATERNARY SYSTEM (On the) KCl-Cu Cl,-BaCl,-H,0. 467. 
RADIO-ACTIVITY (The) of rubidium potassium compounds, IT. 22. 
