Smithsonian Repojt, 1 902.— Langlev 



Plate I. 



Experiments on Artificial Good Seeing. Smithsonian Astrophysical 

 Observatory. 



1. Tlie object, ii set 



2. Iiiiase f)f No. 1. \ 

 'S. image of No. 1 , v 



4. Image of No. I 



5. Image of No. 1 



ie.-i of artilirial dniihl, 

 vitlioiit stirriiii; i ,. 

 ■vith stirring. ' , ''"'^l 

 .vithout slirring. I 

 .vitli stirring. j 



^iirc. three niinut 

 E.\iiosure, fdur luinuti 



