Am. Jour Sci.. Vol. XV, 1903. 



Plate I. 



Experiments on artificial good seeing. Smithsonian Astrophysical 

 Observatory. 



No. 



The object, a series of artificial double stars. 

 j Image of No. 1, without stirring / 

 | Image of No. 1, with stirring f ex P osure > 

 j Image of No. 1, without stirring [ 

 ( Image of No. 1, with stirring \ exposure, 



3 minutes. 



4 minutes. 



