Smithsonian Report. 1936. — Guillien 



PLATE 5 



MM. Crommelin and Mathias by the Apparatus Which They Use to 

 Determine the Rectilinear Diameter of Krypton. 



2. M. de Haas in Front of the Electromagnet and the Cryostat Used for 

 ADiABATic Demagnetization. 



