152 Proceedings of the Asiatic Society. [Juny, 
“rapidity on a white wall of one of the Military Establishments of 
“the Rampart of St. Dominique. The effect might be compared 
“ with that which is observed when the light of the Sun falls upon 
“a wall or ceiling after having been reflected from the surface of 
‘‘water in a state of agitation. The same phenomenon appeared 
‘at the emersion of the sun,” the undulations were at first very 
intense and gradually died away. ‘‘M. Arago_ states that 
‘during the few seconds devoted by his colleagues and himself to 
‘the observation of such phenomena the facades of the great tower 
“ of the citadel of Perpignan appeared illuminated by a singularly 
“ Auctuating light.” M. Lenthéric at Montpellier says ‘A little be- 
‘‘ fore the commencement of the total obscuration there were seen 
«on the ground and on the walls undulating shadows composed of a 
“succession of arcs, 3 or 4 decimetres in length, but of much less 
“breadth, which seemed to turn on themselves. The effect was ana- 
“logous to that produced by those moveable shadows which are 
‘seen at the bottom of ashallow basin filled with clear water when 
* the surface, slightly agitated, is illuminated by the sun’s rays.” 
At Seyne, Mr. Savournin says: ‘ There were here and there seen 
‘shadows and luminous patches running after each other, the 
‘ effect of which was similar to that produced by the passage of a 
“¢ succession of small clouds over the sun. These patches were not 
“ all of the same colour, some were red ; others yellow, blue or white. The 
‘children amused themselves running after them, and trying to 
‘put their hands on them. This extraordinary phenomenon was 
‘‘ remarked ae) a few instants before the complete disappearance 
*‘ of the sun.’ 
Professor Grant quotes some Swedish observations of 1733, but 
they do not seem to me to refer to the same phenomenon. The 
accompanying quoted by him from Delisle, however, clearly 
refers to this. ‘‘ The second observation is one which a curi- 
‘ous individual acquainted me with having made by mere 
“accident. Having directed his attention to a large white wall, 
“ at the moment of the total immersion of an Eclipse of the Sun, 
“ he saw the Moon’s shadow pass upon the wall, tinged with different 
“colours.” 
This phenomenon was also seen and drawn by M. Poulain a 
