1691 
Consequently we find, in accordance with our deductions in the 
previous communications: 
the series of signs of each reaction between the phases of the 
invariant point defines the P,7-diagramtype, viz. the number of 
bundles of curves ‘and their order of succession, the number of 
curves and their order of succession in every bundle. 
This series of signs does not define, however, which curves go in 
the same direction of pressure (temperature); this is only the case 
with the series of signs of the isentropical (isovolumetrical) reaction. 
Leiden, Inorg. Chem. Lab. (To be continued). 
Physics. — “A Test of the Dispersion Theory of Solar Phenomena, 
derived from Measurements by Adams and St. John on the 
Displacements of Fraunhofer Lines in the Spectra of the 
Sun’s Limb and of Sun-spots”’. By Prof. W. H. Junius. 
(Communicated in the meeting of February 28, 1914, and published 
in: Versl. Afd. Natuurk. XXII, p. 12483—1265). 
This paper was not inserted in these Proceedings, because its 
principal contents had already been communicated by the writer in 
the following English publications: “Note on the General Shift of 
the Fratynorer Lines towards the Red, and on the Distortion of 
the Lines in the Spectrum of Eccentrically Located Sun-spots’, The 
Observatory, Vol. 37, p. 252, 1914, and: “Radial Motion in Sun- 
spots”, The Astrophysical Journal, Vol. 40, p. 1,1914. — A French 
translation of the whole paper will appear in the Archives néerlan- 
daises, 1916. 
Physics. — “Anomalous Dispersion and Fraunhofer Lines. Reply 
to Objections’. By Prof. W. H. Junius. 
(Communicated in the meetings of October 30 and November 27, 1915 
Cf.: Versl. Afd. Natuurk. XXIV, p. 678 and 865). 
This paper has also been published in extenso in the Astrophysical 
Journal, Vol. 43, p. 43, 1916, and will therefore not appear in 
these Proceedings. 
