62 EXPERIMENTS WITH THE DISPLACEMENT INTERFEROMETER. 



O n 20 40 60 80 

 FIG. 37. 



KQ m 



pendulum has not separated as far as its position of equilibrium, the motion 

 here being excessively slow. The whole of the motion in series i to 8 may be 

 followed by moving the micrometer as the ellipses pass through the spectrum. 



#> 



04 



oc 



-OS 



-04 

 -06 

 -08 



75 



205 



75 



Ifo 



9 



70 



ti 



5 



31 



MRS 





& 



45 



(T 



40 60 80 100 W 

 FIG. 38. 



