81 
ously towards the violet, but presents the same oscillation in the 
region ABC. 
Hence the relative distribution of intensity of the light on the 
sun’s disc reckoned with respect to the centre, must present an 
anomaly in the neighbourhood of the maximum of energy. This 
anomaly bears entirely the same character and relates to the same 
region of the spectrum as the anomaly observed by Assor (c.f. fig. 
5 with fig. 1; the part of the curve r outside C in fig. 5 has not 
been observed by AsBor). 
Summary. Starting only from the hypothesis that the sun may be 
conceived as a glowing gaseous body, in which the temperature and 
the density gradually decrease from the centre outward, and the 
outer layers of which consist of little luminous, little absorbing, but 
greatly diffusing and irregularly refracting gas-masses, we have 
derived an explanation of the anomaly, observed in the decrease of 
light of different wavelengths from the centre towards the limb of 
the solar disc. 
Proceedings Royal Acad. Amsterdam. Vol. XXII. 
