W. REINDERS and L. HAMBURGER: "Ultramicroscopic investigation of very 

 thin metalfilms obtained by evaporation in high vacuum". 11. 



Fig. 1. 

 Ultramicroscopic image of silver 

 under canadabalsam. v = 450 X- 



Fig. 2. 

 Silver; lower part protected by canada- 

 balsam from the influenceof theair, the 

 upper part not protected. v=800X. 



Fig. 3. 

 Gold. V = 450 X- 



Fig. 4. 

 Molybdenum (heated in vacuo). 

 v = 800X- 



Fig. 5. 

 Cadmium. v=450X- 



Proceedings Royal Acad. Amsterdam. Vol. XX. 



