( 510) 



have detected the absence of the image by means of the controlling 

 telescope and could have removed the mirror into its proper position, 

 now, however, the absence of any image was quite accounted for 

 by the clouds. As a few seconds before the beginning of totality 

 the sun broke through the clouds the absence of the image was 

 stated and the displacement of the mirror became manifest; yet 

 without proper assistance it was impossible to put it in order. 



(December 21, 1905). 



