Proceedings of the section of sciences - DWC - KNAW

CON T TI N T S. XXI
V R lES (J A N DE) pi esents a' paper of Z. P. 130uMAN: "An article on the know-
1edge of the tetrahedral complex." 358.
- A gronp of complexes of rays whose singular surface consists of a sCl'o11 and a
number of planes. 662.
- Same properties of penrils of algebraic curves. 817.
W A ALS CV A N DER) l/--sLuface (Contributions to the knowledge of). X. On the
possibility of predicting the properties of mixtures from those of tbe components. 743.
W A ALS (J. D. V A N D lJ R). The slmpe of the sections of the surface of saturation
normal to the x axis, in case of a three phase pressure between two temperatures. 184.
- The T,.vequililnia of solid and fluid plIases for I'ariable values ofthe pressure. 193.
- presents a paper of Dl'. A. SMITS: "On tho hidden equihbria in the p,x-diagralll
of a binary system in consequence of the appearance of solid substances." 196.
- presents a 11Uper of Dr. A. SMITS: "Contribution to t1i.e know1edge of the px­
and the pT-1mes for the case theLt two substances enter into a combination which
is dissociated in the 1iquid and the gasphase." 200.
- Properties of the critica1 1ine (plaitpoint Hne) on the side ofthe components. 271.
- 'l'he properties of the sections of the surface of saturation of a binary mixture
on the side of the components. 280.
- The exact numerical values for the properties of the plaitpoint line on the side
of the components. 289.
- presents a paper of Prof. J. D. VAN DER WAAI.S JR.: "Remarks concerning the
dynamics of the electron." 477.
W A ALS J R (J. D V A N DE lt). Remarks concerning the dynamics ofthe electron. 477.
WEB E Ilo (M A x) presents a paper of Prof. SYDNEY J. HICKSON: "On a new species
of Corallium from Timor." 268.
WEE D TI R (J.). Approximate forruulae of a high clegree of accuracy for the ratio of the
triangles in the determination of an elliptic orbit from three observations. Il. 104.
WEN T (r. A. F. c.). Same lemarks on the work of Mr. A. A. PULLE, entitled: "An
enumeration of the vascular plants known from Surinam, together with their
distribution and synonymy." 639.
- and A. H. BLAAUW. On a case of apogamy observed with Dasylirion acrotrichum
Zucc. b84.
WIe H H A N N (c. E. A.). On fragments of rocks from the Ardennes found in the
diluvium of tIle Netherlands North of the l-Lhine. 518.
WIL TER DIN K (J. H.). Report on the operations wIth the two slit-spectrographs for
the soJar echpse of August 30, 1905. 506.
WIN D (c. H.) plesents a paper of C. EASTON: "Oscillations of the solar activity and
the climate". 2nd communication. 155.
WIN K L E R (0) presents a paper of D. J. HULSlIorr POL: "BOLK'S centra in the
cerebellum of the mammaha". 298.
- presents a paper of Dr. G. VAN RIJNBERK : "1'he designs on the skin of the
vertebrates, considel'ed in theh cOiinection with the theory of segmentation". 307.
- presents a paper of Dl'. L. J. J. MUSKlJNS: "Anatomical research about cerebellar
connections." 563.
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