XVI C ONT EENES 
Physiology. S. DE Boer: “The structure and overlap of the dermatomes of the hindleg 
with the cat’. 321. 
— H. ZWAARDEMAKER: “Specific smell intensity and the electrical phenomenon of 
cloudlike condensed water vapours in chemical series”. 334. 
— EK, Brouwer: “Researches on the function of the sinus venosus of the frog’s 
heart”. 455. 
— H. ZWAARDEMAKER: “The electrical phenomenon in smell-mixtures”. 551. 
— H. ZWAARDEMAKER: “Radium as a substitute, to an equiradio-active amount, for 
potassium in the so-called physiological fluids’. 633. 
— C. Orro Rorrors: “An exact method for the determination of the position of 
the eyes at disturbances of motion”. 778. 
— KE. Hexma: “Fibrin-excretion under the influence of an electric current’. 900. 
— FE. L, Backman: “The olfactology of the methylbenzol series”, 943. 
— H. J. HAMBURGER and R. BRINKMAN: “Experimental researches on the permea- 
bility of the kidneys to glucose”. I. 989. IL. 997. 
— 8. pE Boer: “Contribution to the knowledge of the influence of digitalis on 
the frog’s heart. Spontaneous and experimental variations of the rhythm”. 1029. 
— H. ZWAARDEMAKER: “On the analogy between potassium and uranium when 
acting separately in contradistinction to their antagonism when acting simulta- 
neously”. 1043. 
— H. ZWAARDEMAKER: “Distance-relations in the effects of radinm-radiation on the 
isolated heart”. 1161. 
PLANE CURVE (The circles that cut a) perpendicularly. IL. 255. 
PLANE FIELD of circles (On a representation of the) on point space. 1130. 
PLANETARY MOTION and the motion of the moon according to Ernstetn’s theory. 367, 
PLANETS (Calculation of dates in the Babylonian tables of) 684. 
PLIS DE PASSAGE (The relation of the) of GRrATIOLET to the ape fissure. 104. 
POINT GROUPS in space (A quadruply infinite system of). 1133. 
POINT SPACE (On a representation of the plane field of circles on). 1130. 
POL JR. (BALTH. VAN DER). The currents arising in v-coupled circuits when 
the primary current is suddenly broken or completed. 225. 
POL (D. J. HULSHOFF). The relation of the plis de passage of GRATIOLET to the 
ape fissure. 104. 
— The ape fissure — Sulcus lunatus — in man. 219. 
— The development of the Fossa Sylvii in embryos of Semnopithecus. 938. 
POTASSIUM (Radium as a substitute, to an equiradio-active amount, for) in the so-called 
physiological fluids. 633. 
—- (On the analogy between) and uranium when acting separately in contradistinction 
to their antagonism when acting simultaneously. 1043. 
POTENTIAL LINES (On some particular cases of current). I. 653, ‘Il. 768. 
PRESSURE-BALANCE (Comparison of the Utrecht) of the van ’r Horr Laboratory with 
those of the VAN DER Waats-fund. 649. | 
PRIME FACTORS (On an arithmetical function connected with the decomposition of 
the positive integers into). I. 826. II. 842. 
