KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
PROCEEDINGS OF THE MEETING 
of Saturday December 28, 1912 and January 25, 1913. 
Ge 
President: Prof. H. A. Lorentz. 
Secretary: Prof. P. ZEEMAN. 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
C. J. C. van HooGennuyze and J. NieuwerNuurse: “Influence of the seasons on respiratory 
exchange during rest and during muscular exercise.” (Communicated by Prof. C. Eykman), 
p. 790. 
W. E. Ringer and H. v. Trier: “The influence of the reaction upon the action of ptyalin.” 
(Communicated by Prof. C. A. PEKELHARING), p. 799. 
W. ve Sirrer: “On absorption of gravitation and the moon’s longitude.” part. I, p. 808 
part II, p. 824. 
Ernst COHEN: “The equilibrium Tetragonal ‘Tin SE Rhombic Tin.’ (Communicated by Prof. 
P. vaN Rompureit), p. 839. 
C. WINKLER: “On localised atrophy in the lateral geniculate body causing quadrantic hemi- 
anopsia of both the right lower fields of visicn’, p. 840. (With 3 plates). 
L. van Iravuir and J. J. van Eck: “On the occurrence of metals in the liver” (Communi- 
cared by Prof. W. EiNruovenN), p. 850. 2 
F A. H. Scurememakers: “Equilibria in ternary systems”. Part II, p. 853, Part III, p. 867. 
Jan DE Vries: “On complexes which can be built ap of linear congruences”, p. 879. 
A. Suirs, J. W. TeErwey, and H. L. pr Leeuw: “On the system phosphorus.” (Communicated 
by Prof. A. F. HOrrLEMAN), p. 885. 
HENDR. DE Vries: “On loei, congruences and focal systems deduced from a twisted cubic and 
a twisted biquadratic curve” IIT, p. 890. 
J. D. van per Waars: “Some remarkable relations, either accurate or approximative for 
different substances.” p. 903. 
JAN DE VRIES: “On metric properties of biquadratie twisted curves.” p. 910. 
JAN DE Vries: “On the correspondence of the jairs of points separated harmonically by a 
twisted quartic curve.” p. 9:8. 
JAN DE VRIES: „ On a line complex determined by two twisted cubics.” p. 922, 
L. H. Siertsema: “Determinations of the refractive indices of gases under high pressures;” 
(2nd Communication: On the dispersion of air and of carbon dioxide). (Communicated by 
Prof. H. KAMERLINGH ONNES), p. 925. 
M. W. Brigeriner: “On the composition of tyrosinase from two enzymes.” p. 932. 
W. van DER Woupr: “On STEINERIAN points in connexion with systems of nine ¢-feld points 
of plane curves of order 32.” (Communicated by Prof. P. H. Scuoure), p. 938. 
H. KAMERLINGH Onnes and Bexer Beckman: “On the change induced by pressure in 
electrical resistance at low temperature” I Lead. p. 947. 
H. KAMERLINGH Onnes and C. A. CROMMELIN: “Isotherms of monutomic substances and of 
their binary mixtares. XIV. Calculation of some thermal quantit.es for argon p. 952. 
E. Maruias, H. KAMERLINGE ONNES, and C. A. CROMMELIN: “On the rectilinear diameter for 
argon”. (Continued), p. 960. 
H. KAMERLINGH Onnes and FE. Oosreruuis: “Magnetic researches VII. On paramagnetism at 
low temperatures.” (Continued), p. 965. 
J.D. van per Waats: “The law of corresponding states for different substances.” p. 971. 
H. KAMERLINGH ONNES and BENGT BECKMAN: “On the Harr-effect, and on the change in 
resistance in a magnetic field at low temperaiures. VI, p. 981, id. VII, p. 988, id. VIII 
p.4997. 
T. Tammes: “Some correlationphenomena in hybrids.” (Communicated by Prof. J. W. Morr), 
p- 1004, 
Jou. H. van Burkom: “On the connection between pbyllotaxis and the distribution of the 
rate of growth in the stem.” (Communicated by Prof. Wernr), p. 1015. 
Pu. KonnstamM and J. Timmermans: “Experimental investigations concerning the miscibility 
of liquids at pressures up.to 3060 atmospheres.” (Communicated by Prof. J. D. van DER 
Waats), p. 1021. 
J. P. van DER Srok: “On the interdiurnal change of the air- temperature”, p. 1037. 
. 
52 
Proceedings Royal Acad. Amsterdam. Vol. XV. 
